Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6223475f5e3c05c2dace50ab3a43d91052d9053c8d2a2a80453ac9033ae9083' 
  AND token = '2OHTJh8gERBzfWcmIDJVXiDZXzgjR1xsx4jC/piWBJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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