SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3451c9c07f113a0ef628889ad6d3ba9cfa4773d41a65cacf710905b69d46c85b' 
  AND token = 'yw9FxwKelRDrVAhyP6LWF9SlciIUgdpW1gNvg1FrFZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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