SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8963e38c3b856207ca8b473cdd43b5bac8559fc7ca69883b3cc9175e8d86f473' 
  AND token = 'uagfY/l0J0xZ1ZKiumVkYw8CsYZV0mj/gtxJPC/pk6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}