Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6250432b4b5bd9ffb427d0adb8726a7742aa6e55da451a47c2a352757d8731f' 
  AND token = 'MsZwpT0OcXgFSstsrhORPa2A4pBO5M+KpSQTk2mFdNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}