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 (
    95513, 95514, 95515, 95516, 95517, 95518, 
    95519, 95520, 95521, 95522, 95523, 
    95524, 95525, 95526, 95527, 95528, 
    95529, 95530, 95531, 95532, 95533, 
    95534, 95535, 95536, 95537, 95538, 
    95539, 95540, 95541, 95542, 95543, 
    95544, 95545, 95546, 95547, 95548, 
    95549, 95550, 95551, 95552, 95553, 
    95554, 96177, 96178, 96179, 96180, 
    96181, 96182, 96183, 96184, 96185, 
    96186, 96187, 96188, 96190, 96191, 
    96192, 96781, 96782, 96783, 96784, 
    96785, 96786, 96787, 96792, 96793, 
    96794, 96795, 96796, 96797, 96798, 
    96799, 96800, 96801, 96802, 96803, 
    96804, 96805, 96806, 96807, 96808, 
    96809, 96810, 96811, 96812, 96813, 
    96814, 96815, 96816, 96817, 96818, 
    96819, 96820, 96821, 96822, 96823
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00069

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 (95513,95514,95515,95516,95517,95518,95519,95520,95521,95522,95523,95524,95525,95526,95527,95528,95529,95530,95531,95532,95533,95534,95535,95536,95537,95538,95539,95540,95541,95542,95543,95544,95545,95546,95547,95548,95549,95550,95551,95552,95553,95554,96177,96178,96179,96180,96181,96182,96183,96184,96185,96186,96187,96188,96190,96191,96192,96781,96782,96783,96784,96785,96786,96787,96792,96793,96794,96795,96796,96797,96798,96799,96800,96801,96802,96803,96804,96805,96806,96807,96808,96809,96810,96811,96812,96813,96814,96815,96816,96817,96818,96819,96820,96821,96822,96823)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}