Van den Keybus made his professional debut with Club Brugge II in a 2–0 Belgian First Division B loss to RWDM47 on 22 August 2020.
[1] The following week, Club Brugge announced that they had extended Van den Keybus' contract through 2023.
[4] On 13 August 2021, Van den Keybus joined Westerlo on a season-long loan.
[5] Van den Keybus debuted for Westerlo on 15 August 2021, during a 2–0 victory over Virton.
[7] On 5 July 2023, Van den Keybus returned to Westerlo on a permanent basis and signed a three-year contract.