Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd58e6b9a8ebc3216af199533ac4b8909ba4840634189473e7bfb91627bec5ddf' 
  AND token = 'cvbaM5xIdhRrUPmlwTtBEQNN0jCYE6cwu2KDB0f2cmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}