Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '592dba35feb9f22d31807dd72419ddce2759b03fd9ece7b6a9426ccf149c9b84' 
  AND token = '142TLi1NnIl1b0rN1AUGh5+AIbpV6vpxVLyF4Plh9Oc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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