Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1b03128f07d1ee4a35586b4502bea4b79646a0feb4a1ecd39c7a7381e9132ec' 
  AND token = '7mxD3s2TFj+kVVg+OnaFlzVzD4/YgH39MzCdECDYYjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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