Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2de03563fe1dfd6a601e00c964df217f3ad1fdf6bb7805417356b38f44e40b2a' 
  AND token = 'SEyVTMrPH1Bb6Vm5KqATLad1Bck7n4iO46NItccFNmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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