Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33ec00fbf2615a7d87d7658d07d782327369847a04ea3656e80a5de4827a68e0' 
  AND token = 'aQPHanob+ajFyOy5HsedlpoBu9WvVrq/hhOCTTzEjgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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