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 (
    82561, 90268, 90264, 90266, 90273, 91311, 
    91313, 91315, 90267, 90274, 85649, 
    85650, 85651, 91312, 91314, 91316, 
    90263, 90270, 90269, 90275, 90265, 
    93356, 93357, 93358, 94117, 94958, 
    95683, 95702, 95703, 96841, 96918, 
    96919, 96998, 98538, 98539, 98540, 
    98541, 98542, 98543, 98544, 98545, 
    98546, 98547, 98548, 98549, 100971, 
    100972, 100973, 100974, 100975, 100976, 
    100977, 100978, 100982, 100983, 100984, 
    100988, 101102, 101103, 101104, 101628, 
    101629, 101630, 101631, 101632, 101633, 
    101678, 101679, 101680, 101681, 101740, 
    101741, 101742, 101743, 101854, 101855, 
    101856, 101857, 101858, 101859, 101860, 
    101861, 101862, 101863, 101864, 101865, 
    101866, 101867, 101868, 101869, 101870, 
    101871, 101928, 101929, 101930, 101931
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00170

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 (82561,90268,90264,90266,90273,91311,91313,91315,90267,90274,85649,85650,85651,91312,91314,91316,90263,90270,90269,90275,90265,93356,93357,93358,94117,94958,95683,95702,95703,96841,96918,96919,96998,98538,98539,98540,98541,98542,98543,98544,98545,98546,98547,98548,98549,100971,100972,100973,100974,100975,100976,100977,100978,100982,100983,100984,100988,101102,101103,101104,101628,101629,101630,101631,101632,101633,101678,101679,101680,101681,101740,101741,101742,101743,101854,101855,101856,101857,101858,101859,101860,101861,101862,101863,101864,101865,101866,101867,101868,101869,101870,101871,101928,101929,101930,101931)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}