Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdaa1e1c1f009b300ae0ea69c5efcfd87a40c7a32f3b5697254f609f9f1b3f9f' 
  AND token = 'dB48BgvOnvGoNXH7JRyKZ4og1eZx3M9J3NDe0e5huF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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