Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22a8f66d7b33b9adc0def21d3d11b5c083e94e128d4ab00f8e1a3ffdff0998b0' 
  AND token = 'OifC/8qN4TiIPrh4p6O7x5DbBjFN4ys/IxckwHfm+wY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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