Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc436d23ae57c17bb56157c8ddb179f6f860b1b9e847592ef7eac2e82ce64a40' 
  AND token = 'QOhNKOZJ3BAHAkSb6WNrImNqnlWna+QNwe/F1xZx+wE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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