Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ca5d78145419ebb6758e60d78dff3dd32d06f635ffc4196378a169e6f41536e' 
  AND token = 'odB1clNpubL7OdXVIN7WISq72hN4Uh316WbKt+Rhmtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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