Xpath - select multiple values (key value pairs)

Having this XML:

       <slot nodeId='123'>
       <properties>
        <property key="key1" value="value1"/>
        <property key="key2" value="value2"/>
        <property key="key3" value="value3"/>
        ...
        ...
        <property key="keyN" value="valueN"/>
        <property key="keyN+1" value="valueN+1"/>
       </properties></slot>

How can I get multiple values from xml, in this format:

For properties:

key='key1' and key='key10' (multiple conditions)

I want output:

value1 value10

Thx a lot!