SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41099244b58f7465a978ecddfd743197d96925935f101d651cb541de10382981' 
  AND token = '5PWyGgj4QoYZmwUQudK/l6llvf8wHdnpEWZvIaIpvbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}