Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd458884ff0aeaee9535dd0f3e773fc1440a4f109bde38ce748bf6faf160db64d' 
  AND token = 'lkmU3F/J0dqKTz4l6dt7bIQEPjLpmmi8RWbaa/YWIoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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