You can only claim the Metal Key and Jewel Key on their specific day of release. You can check the schedule below.
- Monday - Metal Key
- Tuesday - Metal Key
- Wednesday - Jewel Key
- Thursday - Metal Key
- Friday - Metal Key
Take note that if you haven't claimed the key for that specific day, you won't be able to claim it on the next day.
If you want to know more about the maximum numbers of keys you can redeem, you can check out our article here.