Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb550c913fe5fe9095fbba7079549090d6ab39d469a8544b8b7515d3709e7414' 
  AND token = 'DM8cxmA2t3SJD3EuFr3l8EkhN1353153c0rS9lHkRc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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