Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8b84fd62ce26eacce65a65cb1733fdf0ed6bff3b75735830282c29a4a2a4680' 
  AND token = 'oRCL3fyKHu7y1534xADnHSIn/O1LPLH5XPKRxVgk5QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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