Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e0bb7824785333a474e4953db9ba5302361585f6367e8fb1c6d50f8e452a011b' 
  AND token = 'TjreSWde+MJzDotqp43OmrcIrKAYCw8EalPYNuz5viU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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