Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c9772fc5ccceaddad454d299252e24fc462cdce7625f8cb37d5375cb0fb2f59' 
  AND token = 'HKN7Iha5uQRGcsiYVdhIuUOdEZqCbX6fw5KUA7G0L9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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