Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:188.8.131.52.
Your query was changed from:
parsed.tbs_noct_fingerprint: d3fe7073da1f0bc2ace8379d492e0dc37565ee0258199d00b7d6fdd8073c6d12 and precert: true
parsed.tbs_noct_fingerprint: d3fe7073da1f0bc2ace8379d492e0dc37565ee0258199d00b7d6fdd8073c6d12 AND precert: true
If this isn't what you intended, you can run your raw query without expansion.