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 (
    98785, 98786, 98787, 98788, 98789, 98790, 
    98791, 98792, 98793, 98794, 98795, 
    98796, 98797, 98798, 98799, 98800, 
    98801, 98802, 98803, 98804, 98805, 
    98806, 98807, 98808, 98809, 98810, 
    98811, 98812, 98813, 98814, 98874, 
    98875, 98876, 98877, 98878, 98879, 
    98880, 98881, 98886, 98887, 98888, 
    99056, 99057, 99058, 99059, 99060, 
    99061, 99062, 99063, 99064, 99065, 
    99067, 99077, 99078, 99081, 99082, 
    99110, 99111, 99112, 99113, 99114, 
    99115, 99116, 99117, 99118, 99119, 
    99120, 99121, 99122, 99123, 99124, 
    99125, 99126, 99127, 99128, 99129, 
    99130, 99131, 99132, 99134, 99135, 
    99143, 99144, 99162, 99163, 99164, 
    99165, 99166, 99168, 99171, 99172, 
    99173, 99174, 99175, 99176, 99177
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00159

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "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": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (98785,98786,98787,98788,98789,98790,98791,98792,98793,98794,98795,98796,98797,98798,98799,98800,98801,98802,98803,98804,98805,98806,98807,98808,98809,98810,98811,98812,98813,98814,98874,98875,98876,98877,98878,98879,98880,98881,98886,98887,98888,99056,99057,99058,99059,99060,99061,99062,99063,99064,99065,99067,99077,99078,99081,99082,99110,99111,99112,99113,99114,99115,99116,99117,99118,99119,99120,99121,99122,99123,99124,99125,99126,99127,99128,99129,99130,99131,99132,99134,99135,99143,99144,99162,99163,99164,99165,99166,99168,99171,99172,99173,99174,99175,99176,99177)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}