SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (291, 293, 307, 310, 352) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 5,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (291,293,307,310,352) and cscart_product_descriptions.lang_code = 'en'"
    }
  }
}

Result

product_id meta_keywords meta_description search_words promo_text
291 Nikon, D810, D810A, D800, D800E, Camera, Tripod, Head, Quick, Shoe, Clamp, Plate, Arca-Swiss, rrs, kirk, foba Markins P810U is an anti-twist flange style camera plate for Nikon D810 D810A D800 D800E without battery grip.
293 Fujifilm, X-T1, Camera, Tripod, Head, Quick, Shoe, Clamp, Plate, Arca-Swiss, rrs, kirk, foba Markins PT-T1 is an anti-twist style custom camera plate for Fujifilm X-T1 camera. It can be converted to an L-Plate(L-bracket) with optional sub plate LF-T1.
307 Camera, Tripod, Head, Quick, Shoe, Clamp, Plate, Arca-Swiss, rrs, kirk, foba, universal Markins PU-40 is a universal style camera plate for medium sized SLR cameras. It has a rubber bumpons for anti-twisting.
310 Camera, Tripod, Head, Quick, Shoe, Clamp, Plate, Bracket, Arca-Swiss, rrs, kirk, foba Optional LF-T1 for PF-T1 to convert it to L-Plate（L-Bracket） *Requires PF-T1 camera plate.
352