Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1c5d5da47fca1e11df5b9084f8b14831b1a506d45c8d985dce7912f119d3ac' 
  AND token = 'ROiLZeXgtRVt/w3MnfSnw1NYST8wZg946pXtJzE89HU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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