Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ab166ce81e0bbc95f23fb1995d95e8466d021992a746ddc0371e2db2c5f063e' 
  AND token = 'Gfb/c/8u6+e3U8MSzbkLU95WCjxgr9DagPRzqDjlA8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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