Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3eb8101aaccfd1d219f3dfe28da8050bd92110cb6d02850395d17aadaee079b' 
  AND token = 'LvFhcNjSR/9pBGWr2x9ePw+IE8FAX1tMVDg/s42aohk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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