How to check device-token for push notifications?

Question

Mobile development

noticed errors when sending push notifications and saw that a lot of tokens in my database do not pass regular validation, most of the tokens look like 053335385893abad931998534c69fe5049a5781a34ddce8bfe782cf83afa751a are marked as tokens of iOS devices, and the library considers them not valid + judging by the documentation, this is not a valid token, I can’t understand what kind of data then?