Laravel 6 redis caching not able to get cached items - caching

Question

[Update]
I find that laravel cashes in only 1 key no matter how many keys I try to save but I always find only 1 key this one "laravel:9a261d789b8265a6b0495ea5d87481b4589422b1"
I have tried
if (Cache::store('redis')->has('bar')) {
echo ' - bar key cache exists - ';
}
else{
echo ' - bar key cache does not exist - ';
}
Cache::store('redis')->put('bar', 'baz', 600);
$value = Cache::get('bar');
echo $value; exit;
And I always get - bar key cache does not exist - baz why!!??
I'm trying to implement redis caching in Laravel Homestead localhost here's the .env
PP_NAME=mysite
APP_ENV=local
APP_KEY=base64:887AJ9PHxl7W/QS4g8VrMch6CTL4QMLneq4dHx2KhoE=
APP_DEBUG=true
APP_URL=https://mysite.test:44300
PAGINATE=10
DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=mydb
DB_USERNAME=homestead
DB_PASSWORD=secret
CACHE_DRIVER=redis
SESSION_DRIVER=file
QUEUE_DRIVER=sync
REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379
and config/database.php
'redis' => [
'client' => 'predis',
'default' => [
'host' => env('REDIS_HOST', '127.0.0.1'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => 0,
],
'cache' => [
'host' => env('REDIS_HOST', '127.0.0.1'),
'password' => env('REDIS_PASSWORD', null),
'port' => env('REDIS_PORT', 6379),
'database' => env('REDIS_CACHE_DB', 1),
],
],
in config/cache.php
'redis' => [
'driver' => 'redis',
'connection' => 'default',
],
Now in the controller:
$posts = Cache::remember('posts_cache', 600, function () use ($where) {
return Post::where($where)->inRandomOrder()->paginate(3);
});
when I print $posts every time I get different posts not the cached 3 posts. I run
redis-cli monitor
And find that it's caching. I run
redis-cli
Then
keys *
I get this
1) "laravel:9a261d789b8265a6b0495ea5d87481b4589422b1"
2) "laravel:9a261d789b8265a6b0495ea5d87481b4589422b1:timer"
How can I retrieve cached data from redis? what's wrong with my code?