Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baee4ae9b59a92ff0bedcb1f0a10f891348ea54238e01e62b337c8dd81156ff3' 
  AND token = 'm0hVUkVRuQ8f/T9zutaQIeC0RyLUaEAlJ/g2RX+cdEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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