Handle multiple CC indexes when searching by a pubkey (edge case)

[pbca26]

In certain cases searching by a pubkey returns multiple CC indexes e.g. https://explorer.komodoplatform.com:10000/tkltest2/api/tokens/pubkey2index?pubkey=037a2cc57557897f7b09d0eefed7d993148f1199bf90ef863ff3bb0b139c7be767