SELECT 
  cscart_bm_snapping.grid_id as grid_id, 
  cscart_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  cscart_bm_block_statuses.object_ids as object_ids, 
  cscart_bm_snapping.*, 
  cscart_bm_blocks.*, 
  cscart_bm_blocks_descriptions.* 
FROM 
  cscart_bm_snapping 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_bm_snapping.block_id 
  LEFT JOIN cscart_bm_block_statuses ON cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id 
  AND cscart_bm_block_statuses.object_type LIKE '' 
  LEFT JOIN cscart_bm_blocks_descriptions ON cscart_bm_blocks.block_id = cscart_bm_blocks_descriptions.block_id 
  LEFT JOIN cscart_bm_blocks_content AS default_content ON cscart_bm_blocks.block_id = default_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN cscart_bm_blocks_content AS dynamic_object_content ON cscart_bm_blocks.block_id = dynamic_object_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    560, 561, 562, 563, 564, 565, 566, 567, 
    568, 569, 570, 571, 572, 573, 574, 576, 
    578, 579, 580, 575, 577, 581
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'ja' 
  AND cscart_bm_blocks.company_id = 1 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.00195

JSON explain

{
  "query_block": {
    "select_id": 1,
    "ordering_operation": {
      "using_filesort": true,
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_bm_snapping",
            "access_type": "range",
            "possible_keys": [
              "grid_id"
            ],
            "key": "grid_id",
            "used_key_parts": [
              "grid_id"
            ],
            "key_length": "4",
            "rows": 27,
            "filtered": 100,
            "index_condition": "(`_testcscart`.`cscart_bm_snapping`.`grid_id` in (560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,576,578,579,580,575,577,581))"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_block_statuses",
            "access_type": "ref",
            "possible_keys": [
              "snapping_id"
            ],
            "key": "snapping_id",
            "used_key_parts": [
              "snapping_id"
            ],
            "key_length": "4",
            "ref": [
              "_testcscart.cscart_bm_snapping.snapping_id"
            ],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "<if>(is_not_null_compl(cscart_bm_block_statuses), ((`_testcscart`.`cscart_bm_snapping`.`snapping_id` = `_testcscart`.`cscart_bm_block_statuses`.`snapping_id`) and (`_testcscart`.`cscart_bm_block_statuses`.`object_type` like '')), true)"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "_testcscart.cscart_bm_snapping.block_id"
            ],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "(`_testcscart`.`cscart_bm_blocks`.`company_id` = 1)"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks_descriptions",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "lang_code"
            ],
            "key_length": "10",
            "ref": [
              "_testcscart.cscart_bm_snapping.block_id",
              "const"
            ],
            "rows": 1,
            "filtered": 100,
            "index_condition": "(`_testcscart`.`cscart_bm_blocks_descriptions`.`lang_code` = 'ja')"
          }
        },
        {
          "table": {
            "table_name": "default_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "snapping_id",
              "lang_code",
              "object_id"
            ],
            "key_length": "18",
            "ref": [
              "_testcscart.cscart_bm_snapping.block_id",
              "const",
              "_testcscart.cscart_bm_blocks_descriptions.lang_code",
              "const"
            ],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "<if>(is_not_null_compl(default_content), (`_testcscart`.`default_content`.`object_type` like ''), true)"
          }
        },
        {
          "table": {
            "table_name": "dynamic_object_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "_testcscart.cscart_bm_snapping.block_id"
            ],
            "rows": 3,
            "filtered": 100,
            "attached_condition": "<if>(is_not_null_compl(dynamic_object_content), ((`_testcscart`.`dynamic_object_content`.`object_id` = 0) and (`_testcscart`.`dynamic_object_content`.`lang_code` = `_testcscart`.`cscart_bm_blocks_descriptions`.`lang_code`) and (`_testcscart`.`dynamic_object_content`.`object_type` like '')), true)"
          }
        }
      ]
    }
  }
}