Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92a8f5281359d2e725c8dbc37355e9e4a4e4deb638967235d322295c04a0fa7d' 
  AND token = 'NqKa0OoKzL235P3JTV6yXpQs0TKl4sLePCNkxR05vZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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