SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14f6746d2bf8868b3e9210c15a2ecea45ad3b7dfd1ffe515569dc41d96ec96cc' 
  AND token = 'VEwNV7wp8UDahfkYZd5jqksmiBgjE4YUJFinB7SWYAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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