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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    1130, 1127, 1126, 1125, 1124, 1123, 1111, 
    1110, 1109, 1108, 1107, 1099, 1094, 
    1088, 1054, 1053, 1051, 1050, 1048, 
    967, 960, 959, 958, 957, 956, 955, 954, 
    953, 952, 951, 950, 946, 941, 935, 932, 
    931, 930, 517, 515, 478, 477, 476, 475, 
    474, 434, 433, 432, 431, 424, 421, 420, 
    419, 369, 349, 332, 303, 302, 301, 300, 
    299, 298, 297, 296
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00622

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "44.11"
    },
    "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": 63,
      "rows_produced_per_join": 63,
      "filtered": "100.00",
      "index_condition": "((`wearethehelpful_scalesta_net`.`cscart_product_descriptions`.`product_id` in (1130,1127,1126,1125,1124,1123,1111,1110,1109,1108,1107,1099,1094,1088,1054,1053,1051,1050,1048,967,960,959,958,957,956,955,954,953,952,951,950,946,941,935,932,931,930,517,515,478,477,476,475,474,434,433,432,431,424,421,420,419,369,349,332,303,302,301,300,299,298,297,296)) and (`wearethehelpful_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "37.81",
        "eval_cost": "6.30",
        "prefix_cost": "44.11",
        "data_read_per_join": "287K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ]
    }
  }
}