Doesn't sound like it's intended to kill mites, only to sooth the skin from bites, & I'm not sure that snake skin responds well to oils of any kind, though I know
for sure you don't want to use an oil that's petroleum based (like Vaseline), as it somehow makes their scales "de-laminate".

The ingredients may be "all natural" but they are normally never applied to snakes, so I don't know. I wouldn't hesitate to use it on my own skin, but not sure
whether I'd put on a snake...let us know if you do? When I first saw "snake oil" I must admit I thought the worst... (image from the Old West with a covered
wagon full of "snake oil"- made from snakes- & the con-man pitching for sales...)