As a rule of thumb: if you can do something without a blockchain, you shouldn't use a blockchain.
In this case, you can just sell "hours": the user buys credit that allows him to use the scooter for a certain number of hours. A centralized database can handle this, so there's no need for a (decentralized) tokenized system.

Unless of course you want to go full-on ICO, claim you're going to disrupt the rental industry, cash a few millions, and disappear without ever completing the project. Because this cynical summary is the reality of almost every token project ever created.

As an example of a company doing something similar: Greenwheels offers subscriptions for rental cars. You can choose between several combinations of fixed fee per month, per kilometer or per hour. It allows renting a car for less than an hour, and you only pay for the time you use it. A lower fee per month means a higher fee per km, and users who use it more often can opt for a higher monthly and lower usage fee.
This works without blockchain, it's a "conventional" company which uses a "conventional" database.

One reason to use cryptographic tokens would be to allow anyone to transfer the tokens P2P in an app, but I assume you want to know who's using your scooters (for insurance purposes). That takes away the main advantage tokens could offer.

Update: If you want to pay me for this, I'll post my addy
Update: payment received.