How do you calculate the VA value of a relay?
The maximum voltage and maximum current are not allowed to occur in the same application.

If you are running the contacts at the 2A maximum current you are limited to 62.5V to ensure you don't exceed the 125VA rating.

If you are running the contacts at 220V AC you must limit the current to 125/220 = 0.56A.

The rationale behind this is that the arc energy that limits the life of the contacts depends upon both the current and the voltage.

Often the DC rating will be far less than the AC rating as a DC arc can be self-sustaining. That relay doesn't seem too bad, often on manually operated switches the DC voltage may be limited to only 30V but 250V AC.  With AC the arc that is formed upon opening of the contacts will be quenched when the voltage goes to zero every half-cycle.