SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    98731, 98732, 98733, 98734, 98735, 98736, 
    98737, 98750, 98751, 98752, 98753, 
    98754, 98755, 98756, 98757, 98759, 
    98769, 98770, 98771, 98772, 98897, 
    99020, 99021, 99022, 99023, 99024, 
    99025, 99066, 99508, 99509, 99510, 
    99512, 99513, 99514, 99516, 99517, 
    99518, 99528, 99562, 99563, 99564, 
    99565, 99653, 99654, 99655, 99656, 
    99657, 99658
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00160

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "21.63"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 48,
      "rows_produced_per_join": 48,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "16.83",
        "eval_cost": "4.80",
        "prefix_cost": "21.63",
        "data_read_per_join": "183K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (98731,98732,98733,98734,98735,98736,98737,98750,98751,98752,98753,98754,98755,98756,98757,98759,98769,98770,98771,98772,98897,99020,99021,99022,99023,99024,99025,99066,99508,99509,99510,99512,99513,99514,99516,99517,99518,99528,99562,99563,99564,99565,99653,99654,99655,99656,99657,99658)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}