Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ee1196afea565105fc10d47c6441957ed5520871f396be3deb66af1cac10d29' 
  AND token = 'FtthxR/7bFrPZnKR8dHYoKFx/1zis3vjp6lTNz4vKK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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