Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe0de6cbc13c3daec0f8e2f7aa9098c1a364db48c74a3378c328e85c4d462a90' 
  AND token = 'UOYRk0be9MwR8AuN/mBHHqUhrgWHbVqIlksk+UqEYso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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