Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc5cfd8fc9144e769fd275df88ae360f287f6086ce37b776609e8c92ac6c3372' 
  AND token = 'srWyjqZcxvf/BiXTiwQ+l7BUAAExZqD3uiWYsUl5qgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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