You defined your index name pattern when you made the alias: amq-rollover-alias and assigned it to index koffii_amq-000001. You need to set your logstash index to the alias. When you do the rollover through Curator, if the conditions you set are matched, Elasticsearch will create index koffii_amq-000002 and then point the alias at that index. This action will be nearly instantaneous. Indexing to the alias will continue without interruption, but the data will flow into the new index.
You do not define a dynamic index in Logstash. You set index => amq-rollover-alias