Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f72afe8b63d2f29f1ab9deff3409cbcc814ce0f5497e0c296e027a459d90c760' 
  AND token = '3nox2D2iPo1QeaJBKgw3WsUOR5LdVm0HSbAfZJ/fL/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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