Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc109398b0c5e366dfd7134bae12b49279c02f287c3ff3cc85e4b869148ecff9' 
  AND token = 'kf/sEGD8JNv6V4lVEkUGyuOVlt41z8nB4yTDU7x5fus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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