CREATE INDEX filter_polygon_ix2
    ON filter_polygon.filter_polygon USING gist
    (geom)
    TABLESPACE pg_default;

select * from
filter_polygon.filter_polygon AS Filter,
myGeometries AS myGeoms
where
Filter.id = '0101'
AND
ST_Intersects(myGeoms.geometri, Filter.geom);

'Nested Loop  (cost=261.66..25164.63 rows=1934865 width=251228)'
'  ->  Seq Scan on filter_polygon filter  (cost=0.00..5.24 rows=1 width=248951)'
'        Filter: ((origin_id_fieldvalue)::text = '0101'::text)'
'  ->  Bitmap Heap Scan on myGeometries  (cost=261.66..25139.51 rows=1989 width=2277)'
'        Recheck Cond: (geometri && filter.geom)'
'        Filter: (st_intersects(geometri, filter.geom))'
'        ->  Bitmap Index Scan on myGeometries_idx1  (cost=0.00..261.17 rows=5966 width=0)'
'              Index Cond: (geometri && filter.geom)'

'POSTGIS="2.1.8 r13780" GEOS="3.4.2-CAPI-1.8.2 r3921" PROJ="Rel. 4.8.0, 6 March 2012" GDAL="GDAL 1.10.1, released 2013/08/26" LIBXML="2.9.1" LIBJSON="UNKNOWN" RASTER'

'PostgreSQL 9.4.18 on x86_64-unknown-linux-gnu (Ubuntu 9.4.18-2.pgdg14.04+1), compiled by gcc (Ubuntu 4.8.4-2ubuntu1~14.04.4) 4.8.4, 64-bit'