Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fd245dcdf6b3b8cc212cdd6aaa2410023e25b51bc19d1b369a9ce3b42fc4360' 
  AND token = 'IULNc9mcDzWMPFlGeQcvBtEmWV84nCI8+7HgeD24HUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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