Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8abe0e61248b88e2aefe310f8f00ff8ef18feb8459e41ebcf2f39c9f3c957e05' 
  AND token = 'rqUEKcMzkNXxpBLeE9TI4E0l/nMXE+pIabjHEmYJYIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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