SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1028, 1029, 1032, 1034, 1035, 1037, 1038, 
    1039, 1040, 1041, 1042, 1043
  )

Query time 0.00080

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": 12,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1028,1029,1032,1034,1035,1037,1038,1039,1040,1041,1042,1043)"
    }
  }
}