SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fd3f458b93b4de8a53af7bebe311d5606d02b9c91cb0244c33a5d322f178f53' 
  AND token = 'CXhgU/2y7vnenwLHnG6n2WZnYOEDjmu7wmwIqS9jk+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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