Estimates for table greater than records in the table

create table t1 (id1 bigint, id2 bigint, c1 bigint, c2 bigint, c3 bigint, c4 bigint, c5 bigint, c6 bigint, c7 bigint, primary key (id1, id2), index i(c1, c2))engine=rocksdb;

let $i=0;

while ($i<10000)

{

  inc $i;

  eval insert t1(id1, id2, c1, c2, c3, c4, c5, c6, c7)

          values($i,    0, $i,  0,  0,  0,  0,  0,  0);

}

explain select c1 from t1 where c1 > 5 limit 10;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	range	i	i	9	NULL	13300	Using where; Using index