Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aae7c19f433cdbd57c7c4df975b34fdb58394d0ec48a4a3ba98782511927215e' 
  AND token = 'BERpD8WlvkJEQu2GUglNtkYSr1X4nMFsWDc3p/JmEec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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