We show here the design of a magnetoplasmonic sensing platform consisting of a bilayer of a transparent conducting oxide and a gold film grown on a ferromagnetic substrate. Near the bulk plasmon frequency (ε ≈ 0) of the oxide film, sharp resonances are observed for the transverse magneto-optical Kerr effect, which are used for sensing permittivity changes. As a proof of concept, we demonstrate that the proposed architecture is able to detect glucose at millimolar concentration levels in aqueous media, even without any surface functionalization. Because no prism coupler is needed, the sensing platform may be miniaturized and employed in microfluidic systems for point-of-care devices.