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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 (
    3900, 3901, 3913, 116, 3909, 3910, 3911, 
    3897, 53, 5881, 107
  ) 
  AND cscart_ult_product_descriptions.company_id = 1 
  AND cscart_ult_product_descriptions.lang_code = 'en'

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_ult_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "company_id"],
      "key": "product_id",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 11,
      "filtered": 100,
      "index_condition": "cscart_ult_product_descriptions.product_id in (3900,3901,3913,116,3909,3910,3911,3897,53,5881,107)",
      "attached_condition": "cscart_ult_product_descriptions.company_id = 1 and cscart_ult_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id	short_description	full_description	meta_keywords	meta_description	search_words	promo_text
107		<p> Vertex Standard antenna 410-430 MHZ / 3.5".</p>	ATU-6AS Antenna 410-430 MHZ / 3.5" Portable Radios VX-920 Series Antennas Accessories VX-P920	Replacement Vertex Standard ATU-6AS antenna for VX-P920 two way radio.
116		<p> Vertex Standard antenna 161-174 MHz / 3.5".</p><p> This antenna is compatible with the following Vertex Standard two way radios:</p><p> VX-160, VX-180, VX-350, VX-410, VX-420, VX-420A, VX-820, VX-P820, VX-900, VX-920, VX-P920.</p>	ATV-6C Antenna 161-174 MHz / 3.5" Portable Radios VX-160 Series Antennas VX-P820 Accessories VX-P920 VX-920 VX-820 VX-420A VX-420 VX-410 VX-350 VX-180 Trunking Portables	Replacement Vertex Standard ATV-6C VHF Antenna 161-174 MHz.	VX-180 Antenna, VX-920 Antenna, VX-P920 Antenna, VX-160 Antennas