Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1d663d52663f8386475565edbf73e4fe9446e883722cc6a279cc8c1da8bb243' 
  AND token = 'a3DOL6d04i/EtTKkQc/kMrL9KzaQrEJnwUiqPJU7zc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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