Parse and filter MySQL Slow Query Logs Using Grafana - grafana-loki

Question

We have MySQL Slow Query logs writing to Grafana 9.3.6.
Given a MYSQL slow log like the following, I'm trying to filter the log output to logs that are slower than, say, one second.
# User#Host: kermit[muppets] # [99.99.99.99] Id: 54908918
# Schema: frogs Last_errno: 0 Killed: 0
# Query_time: 0.000218 Lock_time: 0.000081 Rows_sent: 1 Rows_examined: 1 Rows_affected: 0 Bytes_sent: 665
# Tmp_tables: 0 Tmp_disk_tables: 0 Tmp_table_sizes: 0
# InnoDB_trx_id: 0
# QC_Hit: No Full_scan: No Full_join: No Tmp_table: No Tmp_table_on_disk: No
# Filesort: No Filesort_on_disk: No Merge_passes: 0
# InnoDB_IO_r_ops: 0 InnoDB_IO_r_bytes: 0 InnoDB_IO_r_wait: 0.000000
# InnoDB_rec_lock_wait: 0.000000 InnoDB_queue_wait: 0.000000
# InnoDB_pages_distinct: 9
# Log_slow_rate_type: query Log_slow_rate_limit: 1000
SET timestamp=1676569875;
select id FROM characters WHERE name='monster';
I've made it this far,
{service="db::muppets"} |~ `Query_time: (\d*\.\d*)`
which correctly highlights the field in the log messages, but now I'd like to use that (\d*\.\d*) capture group to reduce the logs to the queries that are more than one second.
It seems like I need something like this, but this returns no results.
{service="db::muppets"} |~ `Query_time: (?P<query_time>\d*\.\d*)` | query_time > 1
I assume there needs to be some type of text-to-number conversion of the query_time label, but I can't figure that part out.
Grafana is totally new to me.