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 (
    98955, 98956, 98957, 98958, 98959, 98960, 
    98961, 98962, 98963, 98964, 98965, 
    98966, 98967, 98968, 98969, 98970, 
    98971, 98972, 98973, 98974, 98975, 
    98976, 98977, 98978, 98979, 98980, 
    98981, 98982, 98983, 98984, 98985, 
    98986, 98987, 98988, 98989, 98990, 
    98991, 98992, 98993, 98994, 98995, 
    98996, 98997, 98998, 98999, 99000, 
    99001, 99002, 99003, 99004, 99005, 
    99006, 99007, 99008, 99009, 99010, 
    99011, 99056, 99057, 99058, 99059, 
    99060, 99061, 99062, 99063, 99064, 
    99065, 99066, 99067, 99133, 99141, 
    99142, 99151, 99152, 99169, 99170, 
    99248, 99257, 99262, 99322, 99323, 
    99324, 99325, 99326, 99327, 99328, 
    99329, 99333, 99334, 99335, 99336, 
    99337, 99338, 99339, 99340, 99341
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00148

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 (98955,98956,98957,98958,98959,98960,98961,98962,98963,98964,98965,98966,98967,98968,98969,98970,98971,98972,98973,98974,98975,98976,98977,98978,98979,98980,98981,98982,98983,98984,98985,98986,98987,98988,98989,98990,98991,98992,98993,98994,98995,98996,98997,98998,98999,99000,99001,99002,99003,99004,99005,99006,99007,99008,99009,99010,99011,99056,99057,99058,99059,99060,99061,99062,99063,99064,99065,99066,99067,99133,99141,99142,99151,99152,99169,99170,99248,99257,99262,99322,99323,99324,99325,99326,99327,99328,99329,99333,99334,99335,99336,99337,99338,99339,99340,99341)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
98955
98956
98957
98958
98959
98960
98961
98962
98963
98964
98965
98966
98967
98968
98969
98970
98971
98972
98973
98974
98975
98976
98977
98978
98979
98980
98981
98982
98983
98984
98985
98986
98987
98988
98989
98990
98991
98992
98993
98994
98995
98996
98997
98998
98999
99000
99001
99002
99003
99004
99005
99006
99007
99008
99009
99010
99011
99056
99057
99058
99059
99060
99061
99062
99063
99064
99065
99066
99067
99133
99141
99142
99151
99152
99169
99170
99248
99257
99262
99322
99323
99324
99325
99326
99327
99328
99329
99333
99334
99335
99336
99337
99338
99339
99340
99341