SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    2556, 2822, 2244, 2245, 2808, 2351, 2352, 
    2342, 2270, 2843, 2225, 2323, 2266, 
    13822, 2529, 2503, 2813, 2814, 13821, 
    4378, 2550, 2551, 13142, 15143
  )

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 24,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (2556,2822,2244,2245,2808,2351,2352,2342,2270,2843,2225,2323,2266,13822,2529,2503,2813,2814,13821,4378,2550,2551,13142,15143)"
    }
  }
}