SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    61937, 62229, 64353, 64350, 62246, 64355, 
    62843, 63513, 63467, 63510, 63852, 
    62979, 63853, 63515, 63810, 63854, 
    63806, 64946, 64865, 64863, 64947
  )

Query time 0.00088

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": 21,
      "filtered": 100,
      "attached_condition": "cscart_products.product_id in (61937,62229,64353,64350,62246,64355,62843,63513,63467,63510,63852,62979,63853,63515,63810,63854,63806,64946,64865,64863,64947)"
    }
  }
}

Result