Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '281439c545afde20da5930ab51a5964a4cd3c54e2ba9dd95d59c609a35adaf6b' 
  AND token = 'c4LlFK7zGd/p94FxOSTgPyO3gkX1ZONLZikIey4A9Uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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