Cirrus.ConfigArchive table - config is stored as string so any tool will do.
If you need latest use MAX(downloadtime) and if you need node data then join (maybe a SWIS alias avail?h Cirrus.nodes on nodeid and Orion.Nodes on corenodeid=nodeid.
Config archives or the latest config only? What is a sample search that you would like to do that is not covered by the out of the box 'Search NCM' resource?
If you want to search the latest config only from the configs saved on the NCM filesystem, there is a handy powershell script that you can find by search google with the keywords "powershell ncm jeff truman"