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 (
    97680, 97681, 97682, 97683, 97684, 97685, 
    97686, 97687, 97688, 97689, 97690, 
    97691, 97692, 97693, 97694, 97695, 
    97696, 97697, 97698, 97699, 97700, 
    97701, 97702, 97703, 97704, 97705, 
    97706, 97707, 97708, 97709, 97710, 
    97711, 97712, 98054, 98055, 98056, 
    98057, 98058, 98059, 98060, 98061, 
    98062, 98063, 98064, 98065, 98066, 
    98067, 98068, 98069, 98070, 98071, 
    98072, 98073, 98074, 98075, 98076, 
    98077, 98078, 98079, 98080, 98081, 
    98082, 98083, 98523, 98524, 98525, 
    98526, 98527, 98528, 98529, 98530, 
    98531, 98532, 98533, 98534, 98535, 
    98536, 98537, 98557, 98558, 98559, 
    98587, 98588, 98589, 98773, 98774, 
    98775, 98776, 98777, 98778, 98779, 
    98780, 98781, 98782, 98783, 98784
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00154

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 (97680,97681,97682,97683,97684,97685,97686,97687,97688,97689,97690,97691,97692,97693,97694,97695,97696,97697,97698,97699,97700,97701,97702,97703,97704,97705,97706,97707,97708,97709,97710,97711,97712,98054,98055,98056,98057,98058,98059,98060,98061,98062,98063,98064,98065,98066,98067,98068,98069,98070,98071,98072,98073,98074,98075,98076,98077,98078,98079,98080,98081,98082,98083,98523,98524,98525,98526,98527,98528,98529,98530,98531,98532,98533,98534,98535,98536,98537,98557,98558,98559,98587,98588,98589,98773,98774,98775,98776,98777,98778,98779,98780,98781,98782,98783,98784)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}