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 (
    85974, 85975, 85977, 85978, 85979, 85980, 
    85981, 85982, 85983, 85984, 85985, 
    85986, 85987, 85988, 85989, 85990, 
    85991, 85992, 85993, 85994, 85995, 
    85996, 85997, 85998, 85999, 86003, 
    86004, 86005, 86006, 86007, 86008, 
    86009, 86010, 86011, 86012, 86014, 
    86015, 86017, 86018, 86019, 86020, 
    86021, 86022, 86023, 86024, 86025, 
    86026, 86027, 86028, 86029, 86030, 
    86031, 86032, 86033, 86034, 86035, 
    86036, 86037, 86038, 86039, 86040, 
    86041, 86042, 86043, 86044, 86045, 
    86046, 86047, 86048, 86049, 86050, 
    86051, 86052, 86053, 86054, 86055, 
    86056, 86057, 86058, 86059, 86060, 
    86062, 86064, 86065, 86066, 86068
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00155

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "38.74"
    },
    "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": 86,
      "rows_produced_per_join": 86,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "30.14",
        "eval_cost": "8.60",
        "prefix_cost": "38.74",
        "data_read_per_join": "327K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (85974,85975,85977,85978,85979,85980,85981,85982,85983,85984,85985,85986,85987,85988,85989,85990,85991,85992,85993,85994,85995,85996,85997,85998,85999,86003,86004,86005,86006,86007,86008,86009,86010,86011,86012,86014,86015,86017,86018,86019,86020,86021,86022,86023,86024,86025,86026,86027,86028,86029,86030,86031,86032,86033,86034,86035,86036,86037,86038,86039,86040,86041,86042,86043,86044,86045,86046,86047,86048,86049,86050,86051,86052,86053,86054,86055,86056,86057,86058,86059,86060,86062,86064,86065,86066,86068)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}

Result

product_id short_description full_description
85974 nuie Handles Bar Handle 96mm Centres - Chrome
85975 nuie Handles D Handle 96mm Centres - Chrome
85977 Hudson Reed Handles D Handle 128mm Centres - Chrome
85978 nuie Handles D Handle 320mm Centres - Chrome
85979 nuie Handles Handle 420mm Centres - Chrome
85980 Hudson Reed Profile Handle 352mm Centres - Chrome Black
85981 nuie Handles Seven Shaped Handle 480mm Centres - Chrome
85982 nuie Handles Knurled Bar Handle 96mm Centres - Chrome
85983 nuie Handles Knurled Bar Handle 160mm Centres - Chrome
85984 nuie Handles Knurled Bar Handle 192mm Centres - Chrome
85985 nuie Handles D Handle 192mm Centres - Chrome
85986 nuie Handles D Handle 192mm Centres - Brushed Brass
85987 nuie Handles D Handle 192mm Centres - Matt Black
85988 nuie Handles D Handle 192mm Centres - Copper
85989 nuie Handles Knurled Bar Handle 96mm Centres - Matt Black
85990 nuie Handles Knurled Bar Handle 160mm Centres - Matt Black
85991 nuie Handles Knurled Bar Handle 192mm Centres - Matt Black
85992 nuie Handles D Handle 160mm Centres - Chrome
85993 nuie Handles D Handle 160mm Centres - Brushed Brass
85994 nuie Handles D Handle 160mm Centres - Matt Black
85995 nuie Handles D Handle 160mm Centres - Copper
85996 nuie Handles Knurled Bar Handle 96mm Centres - Brushed Brass
85997 nuie Handles Knurled Bar Handle 160mm Centres - Brushed Brass
85998 nuie Handles Knurled Bar Handle 192mm Centres - Brushed Brass
85999 Hudson Reed D Shaped Handle 256mm Centres - Chrome
86003 nuie Handles Profile Handle 160mm Centres - Chrome
86004 nuie Handles Profile Handle 224mm Centres - Chrome
86005 nuie Handles D Shaped Handle 160mm Centres - Chrome
86006 nuie Handles D Shaped Handle 224mm Centres - Chrome
86007 nuie Handles D Shaped Handle 160mm Centres - Chrome
86008 nuie Handles D Shaped Handle 224mm Centres - Chrome
86009 nuie Handles Profile Handle 160mm Centres - Chrome
86010 nuie Handles Profile Handle 224mm Centres - Chrome
86011 nuie Handles Finger Pull Handle 160mm Centres - Chrome
86012 nuie Handles Finger Pull Handle 224mm Centres - Chrome
86014 nuie Handles Square Drop Handle 32mm Centres - Chrome
86015 nuie Handles Indented Round Knob - Chrome
86017 nuie Handles 328mm D Handle Chrome - Chrome
86018 nuie Handles Square Strap Chrome Handle 128mm Centres - Chrome
86019 nuie Handles Finger Pull Handle 150mm - Chrome
86020 nuie Handles Finger Pull Handle 300mm - Chrome
86021 nuie Handles Finger Pull Handle 500mm - Chrome
86022 nuie Handles Round Strap Chrome Handle 128mm Centres - Chrome
86023 nuie Handles Art Deco Chrome Handle 160mm Centres - Chrome
86024 nuie Handles D Handle 150mm Centres - Chrome
86025 nuie Handles Slim Line D Handle 150mm Centres - Chrome
86026 Hudson Reed Handles Strap Handle 96mm Centres - Chrome
86027 Hudson Reed Handles D Handle 192mm Centres - Chrome
86028 Hudson Reed Handles Small Rear Fixed Handle 50mm Centres - Chrome
86029 nuie Handles Wrap Over Handle 50mm Centres - Matt Black
86030 nuie Handles D Handle 150mm Centres - Matt Black
86031 nuie Handles Slim Line D Handle 150mm Centres - Matt Black
86032 nuie Handles D Shape Bar Handle 210mm Centres - Matt Black
86033 nuie Handles D Shape Bar Handle 210mm Centres - Brushed Brass
86034 nuie Handles Bar Handle 155mm Centres - Matt Black
86035 nuie Handles Bar Handle 155mm Centres - Brushed Brass
86036 nuie Handles Wrap Over Handle 50mm Centres - Brushed Brass
86037 nuie Handles D Handle 150mm Centres - Brushed Brass
86038 nuie Handles Slim Line D Handle 150mm Centres - Brushed Brass
86039 nuie Handles D Shape Bar Handle 210mm Centres - Chrome
86040 nuie Handles Profile Handle 160mm Centres - Matt Black
86041 nuie Handles Profile Handle 224mm Centres - Matt Black
86042 nuie Handles D Shaped Handle 160mm Centres - Matt Black
86043 nuie Handles D Shaped Handle 224mm Centres - Matt Black
86044 nuie Handles D Shaped Handle 160mm Centres - Matt Black
86045 nuie Handles D Shaped Handle 224mm Centres - Matt Black
86046 nuie Handles Profile Handle 160mm Centres - Matt Black
86047 nuie Handles Profile Handle 224mm Centres - Matt Black
86048 nuie Handles Finger Pull Handle 160mm Centres - Matt Black
86049 nuie Handles Finger Pull Handle 224mm Centres - Matt Black
86050 nuie Handles Square Drop Handle 32mm Centres - Matt Black
86051 nuie Handles Indented Round Knob - Matt Black
86052 nuie Handles Knurled Round Knob - Matt Black
86053 nuie Handles 328mm D Handle Matt Black - Matt Black
86054 nuie Handles Finger Pull Handle 150mm - Matt Black
86055 nuie Handles Finger Pull Handle 300mm - Matt Black
86056 nuie Handles Finger Pull Handle 500mm - Matt Black
86057 nuie Handles Chrome Strap Handle 128mm Centres - Chrome
86058 nuie Handles Square Drop Handle 32mm Centres - Brushed Brass
86059 nuie Handles Indented Round Knob - Brushed Brass
86060 nuie Handles Knurled Round Knob - Brushed Brass
86062 nuie Handles 328mm D Handle Brushed Brass - Brushed Brass
86064 nuie Handles Finger Pull Handle 150mm - Brushed Brass
86065 nuie Handles Finger Pull Handle 300mm - Brushed Brass
86066 nuie Handles Finger Pull Handle 500mm - Brushed Brass
86068 nuie Handles Rounded D Handle 160mm Centres - Chrome