I resolved the issue doing the following:
<rule name="301 Rule" stopProcessing="true">
<match url="^([a-zA-Z0-9_'-]+)/([^)]+)$" />
<conditions>
<add input="{QUERY_STRING}" pattern="parm1=89" />
<add input="{QUERY_STRING}" pattern="parm2=63" />
</conditions>
<action type="Redirect" url="http://www.domain.com/result" redirectType="Permanent" appendQueryString="false" />
</rule>