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 (
    88768, 88940, 88449, 88466, 88482, 88690, 
    88737, 84703, 84706, 88082, 91053, 
    87616, 87624, 90815, 88941, 89102, 
    89108, 89110, 89115, 87958, 88068, 
    88675, 88722, 88067, 88512, 88548, 
    88590, 88591, 88592, 90834, 88447, 
    88464, 88480, 88691, 88738, 87548, 
    88141, 88144, 88767, 90829, 88939, 
    89017, 88547, 88583, 88674, 88721, 
    88582, 90833, 89982, 89983, 89984, 
    87620, 87622, 84702, 84705, 91052, 
    88545, 88046, 88403, 84697, 84698, 
    88140, 88143, 88508, 88543, 88765, 
    89016, 88566, 87617, 87625, 87890, 
    88673, 88720, 88401, 84695, 88937, 
    87877, 88045, 88565, 88564, 87636, 
    88515, 88518, 89107, 89114, 88514, 
    88517, 90832, 88511, 87621, 87623, 
    88083, 88671, 88718, 87635, 87638
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00157

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 (88768,88940,88449,88466,88482,88690,88737,84703,84706,88082,91053,87616,87624,90815,88941,89102,89108,89110,89115,87958,88068,88675,88722,88067,88512,88548,88590,88591,88592,90834,88447,88464,88480,88691,88738,87548,88141,88144,88767,90829,88939,89017,88547,88583,88674,88721,88582,90833,89982,89983,89984,87620,87622,84702,84705,91052,88545,88046,88403,84697,84698,88140,88143,88508,88543,88765,89016,88566,87617,87625,87890,88673,88720,88401,84695,88937,87877,88045,88565,88564,87636,88515,88518,89107,89114,88514,88517,90832,88511,87621,87623,88083,88671,88718,87635,87638)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}