Hello. This is Klaytn API Service team.
Please refer to the following information about whether the integrity would be violated when the token history query runs overtime.
First of all, integrity refers to the change in data itself and querying is not about changing data. Thus, it has nothing to do with data integrity.
Also because the latest data comes forward, new data can ‘skip’ while making repeated requests. In other words, if the time runs over, the block will not be created but rather moves on to the newer data.
Klaytn API Service team.