Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8365a52c0884edfc73e5af1e079ff7331e29cb41f9df801c612f840c8dd7feae' 
  AND token = 'gF5TKifYnrIzOxD09tdhCUGc1WDLwodmq/6X4hxLd5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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