The rewards are calculated based on slots that have passed since staking started and staking size, and every staked $ART will mint and reward $AIKO tokens to its owner. The staking period is of 16 weeks, and you can't unstake the tokens until the lock period has ended. The $ART tokens will remain locked in the Staked Holders Address until the reward is available to be claimed.
When the staking period has come to its end, you can claim and keep staking your tokens. After the staking period, you can keep claiming and unstake whenever you want.