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 (
    87354, 87352, 87353, 87378, 87376, 87377, 
    87374, 82509, 87373, 82508, 82537, 
    82547, 91482, 82532, 82545, 82546, 
    89571, 82544, 89569, 92584, 92585, 
    92586, 92590, 92591, 92592, 93951, 
    93952, 93953, 93954, 93955, 93956, 
    94838, 95004, 95005, 95006, 95007, 
    95008, 95009, 95046, 95047, 95048, 
    95057, 95058, 95059, 95060, 95061, 
    95062, 95066, 95067, 95068, 95328, 
    95329, 95330, 95344, 95345, 95346, 
    95349, 95352, 95358, 95359, 95452, 
    95536, 95537, 95538, 95539, 95540, 
    95541, 95552, 95553, 95554, 96177, 
    96178, 96179, 96180, 96191, 96192, 
    96828, 96829, 96830, 96831, 96834, 
    96835, 96836, 96837, 96838, 96887, 
    96888, 96889, 96890, 96891, 96892, 
    96931, 96932, 96933, 96942, 96943
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00242

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 (87354,87352,87353,87378,87376,87377,87374,82509,87373,82508,82537,82547,91482,82532,82545,82546,89571,82544,89569,92584,92585,92586,92590,92591,92592,93951,93952,93953,93954,93955,93956,94838,95004,95005,95006,95007,95008,95009,95046,95047,95048,95057,95058,95059,95060,95061,95062,95066,95067,95068,95328,95329,95330,95344,95345,95346,95349,95352,95358,95359,95452,95536,95537,95538,95539,95540,95541,95552,95553,95554,96177,96178,96179,96180,96191,96192,96828,96829,96830,96831,96834,96835,96836,96837,96838,96887,96888,96889,96890,96891,96892,96931,96932,96933,96942,96943)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}