Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63d1d7e635f5ec7f5ee36185ec330a88866eb3aeea79e6ce9f8a5058e59ac355' 
  AND token = 'qzuVI+iYUWn3LnUzUc4I6CwAAqGgGIXNBxpZ0Iradio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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