RE: The two keys of the HOLY SEE…
They represent;
1] Temporal Power - Gold hey
2] Spiritual Power - Silver Key
The three keys logo of the JESUIT order (shown) are;
1] Temporal Power
2] Spiritual Power
3] Monetary Power.
UBS bank logo has a more esoteric meaning; "The Keys (plural) to success"
…in which they would be typically and traditionally; Money, Fame, Power.
I imagine the same applies for UBS banl's logo with 3 jeys.