Oracle incorrectly favours INDEX RANGE SCAN over INDEX UNIQUE SCAN

I have a table and indexes that look like this:

CREATE TABLE "INDEXES_A"

(    "CLIENT_ID" VARCHAR2(255 CHAR) NOT NULL ENABLE,

"PRODUCT_ID" NUMBER(19,0) NOT NULL ENABLE,

"ID" VARCHAR2(255 CHAR) NOT NULL ENABLE,

"FILE_ID" NUMBER(19,0) NOT NULL ENABLE,

"IND_" NUMBER(19,0) NOT NULL ENABLE,

"LEN_" NUMBER(19,0) NOT NULL ENABLE,

"CREATION_DATE" TIMESTAMP (6) NOT NULL ENABLE,

"UPDATED_DATE" TIMESTAMP (6) NOT NULL ENABLE,

"JOB_ID" NUMBER(19,0) NOT NULL ENABLE,

"TIME_SEGMENT" VARCHAR2(64) NOT NULL ENABLE,

"TEMPLATE_ID" NUMBER(19,0),

"DISC1" VARCHAR2(255 CHAR),

"DISC2" VARCHAR2(255 CHAR),

CONSTRAINT "FK_DF_FILE_ID" FOREIGN KEY ("FILE_ID")  REFERENCES "DATA_FILES" ("ID") ENABLE

)

PARTITION BY LIST ("CLIENT_ID");
CREATE UNIQUE INDEX INDEXES_A_LOCAL_IDX ON INDEXES_A (CLIENT_ID, PRODUCT_ID,  ID) LOCAL;