Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0876854b23a16cd61369933a9472c61498deec9e9e0df2d869105635fcd3a94f' 
  AND token = 'ulPO6fClQ8RFhvZIWtY0zkCFgNkcVxcVQVudYgdNfXU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00095

JSON explain

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