I have tried several times to find this same thing out, I think it's been asked about 5 times now, but I'm still no closer to getting a definite answer. When I do, then I shall update the toxic plant list, as Hazel is still an unknown as well.
Spider plants arn't toxic but i wouldnt recommend them, they need regular watering and that would raise the humidity of your snakies viv. They also grow very quickly and make a lot of babies.