Raul Reider pidio un indice mas.

postgres/10-postgres.sql

@@ -52,6 +52,7 @@ CREATE INDEX            "block_parentBlockHashId"               ON "public"."blo
 CREATE INDEX            "block_sealerAccountId"                 ON "public"."block" ("sealerAccountId");
 CREATE INDEX            "block_number"                          ON "public"."block" ("number");
 CREATE INDEX            "block_timestamp"                       ON "public"."block" ("timestamp");
+CREATE INDEX            "block_sealerAccountId_timestamp"       ON "public"."block" ("sealerAccountId","timestamp");
 
 CREATE TABLE "public"."transaction" (
     "hash"                      character(66)   NOT NULL,