OAK Indexing | Custom Lucene index | AEM 6.3

I am working on optimizing a query by indexing so that it will not traverse through all the nodes. I have created an index definition with the help of Oak Index Definition Generator.

XML of the index definition :

<?xml version="1.0" encoding="UTF-8"?><jcr:root xmlns:nt="http://www.jcp.org/jcr/nt/1.0" xmlns:jcr="http://www.jcp.org/jcr/1.0">

<myIndex compatVersion="{Long}2" async="async" jcr:primaryType="oak:QueryIndexDefinition" evaluatePathRestrictions="{Boolean}true" type="lucene">

<indexRules jcr:primaryType="nt:unstructured">

<nt:base jcr:primaryType="nt:unstructured">

<properties jcr:primaryType="nt:unstructured">

  <prop1 name="prop1" propertyIndex="{Boolean}true" jcr:primaryType="nt:unstructured" nullCheckEnabled="{Boolean}true"/>

  <prop2 name="prop2" ordered="{Boolean}true" jcr:primaryType="nt:unstructured"/>

  <prop3 name="prop3" propertyIndex="{Boolean}true" jcr:primaryType="nt:unstructured"/>

</properties>

</nt:base>

</indexRules>

</myIndex>

</jcr:root>

But it looks like there is something wrong with the configuration or the way I created the index definition. Could anyone help me out in configuring lucene index.

Below is the Xpath query that's been used to generate the index definition :

/jcr:root/content/xyz//*  [ (not(@prop1) or @prop1= 'false')  and ((@prop3= 'apps/components/pages/xyz' or @prop3= '/apps/mda/components/pages/abc'))  ] order by @prop2 descending

Please let me know if there's anything I am missing here.