Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98847b14a8dbad4002bfec2297e51205959b5c5fd1327312d9d968e5ac6fc1ff' 
  AND token = 'mr05IGzd6DtW9D3lnq7EDLyKFhnk2i5KojdxEYPqdTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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