SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10469, 10470, 10471, 10472, 10473, 10474, 
    10475, 10476, 10477, 10478, 10479, 
    10480, 10481, 10482, 10483, 10485, 
    10486, 10487, 10488, 10489
  )

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": 20,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10469,10470,10471,10472,10473,10474,10475,10476,10477,10478,10479,10480,10481,10482,10483,10485,10486,10487,10488,10489)"
    }
  }
}