Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd44ade1659d21c12234366c46110311f029e1a62bd08e0131236a6b0348d786' 
  AND token = 'MHAKXoUqVNLK40TlU7x7nwUoHqH9PlFhVfDjyImAL/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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