Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b24fcc5b7ccf96b17f9a7ef7a1910fa545e2f0ea387068f75206d57348609a4b' 
  AND token = 'fWMxRszD6P8v9PozzUpN13OMdeJctX9c4uMYBiWq5e0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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