Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f36dbd421b60e525f3c2d444aafe769f4cf85db59a85a84c69d953f00429b488' 
  AND token = 'Twc5NQ5v75Qd5lXlxlPPGwn3bUYDdSySWSx62VOxlyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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