pg_search slow query on RDS

pg_search_slow.psql

SELECT "pg_search_documents".* 
FROM "pg_search_documents" 
INNER JOIN (
  SELECT "pg_search_documents"."id" AS pg_search_id, (ts_rank((to_tsvector('simple', 
  unaccent(coalesce("pg_search_documents"."content"::text, '')))), (to_tsquery('simple', ''' ' || unaccent('XXX') || ' ''' || 
  ':*')), 0)) AS rank 
  FROM "pg_search_documents" 
  WHERE (((to_tsvector('simple', unaccent(coalesce("pg_search_documents"."content"::text, '')))) @@ (to_tsquery('simple', ''' ' || unaccent('XXX') || ' ''' || ':*'))))
) AS pg_search_ce9b9dd18c5c0023f2116f 
ON "pg_search_documents"."id" = pg_search_ce9b9dd18c5c0023f2116f.pg_search_id 
WHERE "pg_search_documents"."searchable_type" = 'Mission'  
ORDER BY pg_search_ce9b9dd18c5c0023f2116f.rank DESC, "pg_search_documents"."id" ASC