Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b57aa35f530e60f87e3c0ee8edfcd6c94014f32f42e5e01c92408db8baee04a5' 
  AND token = 'PjlOnM/vBQbCwegHKWfWYyhLe9BsK8HXMKHgsQpPmGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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