SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10193, 10659, 10664, 10666, 10661, 10663, 
    10190, 10657, 10658, 10194, 10692, 
    12530, 12516, 12496, 12519, 12510, 
    10087, 10100, 10698
  )

Query time 0.00038

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": 19,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10193,10659,10664,10666,10661,10663,10190,10657,10658,10194,10692,12530,12516,12496,12519,12510,10087,10100,10698)"
    }
  }
}