Why isn't my query doing a RANGE SCAN?

This is my DDL:

CREATE TABLE IF NOT EXISTS myTable (
d DATE NOT NULL,
o BIGINT NOT NULL,
l UNSIGNED_TINYINT NOT NULL,
s UNSIGNED_TINYINT NOT NULL,
r UNSIGNED_TINYINT NOT NULL,
c BINARY(16) NOT NULL,
t BINARY(16) NOT NULL,
m BINARY(16) NOT NULL,
k BINARY(16) NOT NULL,
e VARCHAR NOT NULL,
i VARCHAR NULL,
q BINARY(16) NULL
CONSTRAINT pk PRIMARY KEY (d DESC, o DESC, l, s, r, c, t, m, k)) IMMUTABLE_ROWS=true

This is my query:

explain select * from myTable where c=1 and t=3;

And this is my result:

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This is my expectation of a result:

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When I try to select something, I've got a "FULL SCAN" instead of "DEGENERATE SCAN". Is it my mistake? Or a bug?