Sandbox

SELECT 
  cscart_ult_product_descriptions.product_id, 
  cscart_ult_product_descriptions.short_description, 
  IF(
    cscart_ult_product_descriptions.short_description = "", 
    cscart_ult_product_descriptions.full_description, 
    ""
  ) AS full_description, 
  cscart_ult_product_descriptions.meta_keywords, 
  cscart_ult_product_descriptions.meta_description, 
  cscart_ult_product_descriptions.search_words, 
  cscart_ult_product_descriptions.promo_text 
FROM 
  cscart_ult_product_descriptions 
WHERE 
  cscart_ult_product_descriptions.product_id IN (3296, 3444, 3471) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "2.37"
    },
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id",
        "company_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code",
        "company_id"
      ],
      "key_length": "13",
      "rows_examined_per_scan": 3,
      "rows_produced_per_join": 3,
      "filtered": "100.00",
      "index_condition": "((`gaseus`.`cscart_ult_product_descriptions`.`company_id` = 1) and (`gaseus`.`cscart_ult_product_descriptions`.`product_id` in (3296,3444,3471)) and (`gaseus`.`cscart_ult_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "2.08",
        "eval_cost": "0.30",
        "prefix_cost": "2.38",
        "data_read_per_join": "11K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "company_id",
        "short_description",
        "full_description",
        "meta_keywords",
        "meta_description",
        "search_words",
        "promo_text"
      ]
    }
  }
}

Result

product_id	short_description	full_description	meta_keywords	meta_description	search_words	promo_text
3444		acc to DIN EN ISO 2503, single stage, with high pressure compensation for a constant working pressure on falling inlet pressure with safety gauges acc. to DIN ISO 5171inlet pressure max:200 bar<br />outlet pressure: 0 – 40 bar adjustable<br />flow max: 120 Nm³/h at 40 bar working pressure<br />inlet connection: W24,32x1/14RHf nut acc. to DIN 477-1, no. 10<br />outlet connection: G 1/4RH x 6mm tail-piece<br />inlet gauge: 0 – 315/200 bar<br />working gauge: 0 – 60/40 bar<br />width x height x depth: 210 x 210 x 75 mm<br />with Linde-Logo stamped on body, with Linde operating manual and Linde adhesive tape
3471		acc to DIN EN ISO 2503, single stage, with high pressure compensation for a constant working pressure on falling inlet pressure, with metal diaphragm, with safety gauges acc. to DIN ISO 5171inlet pressure max:200 bar<br />outlet pressure: 0 – 40 bar adjustable<br />flow max: 120 Nm³/h at 40 bar working pressure<br />inlet connection: G3/4RHf nut acc. to DIN 477-1, no. 9<br />outlet connection: G 1/4RH x 6mm tail-piece<br />inlet gauge: 0 – 315/200 bar<br />working gauge: 0 – 60/40 bar<br />width x height x depth: 210 x 210 x 75 mm<br />with Linde-Logo stamped on body, with Linde operating manual and Linde adhesive tape