Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c9596d3e71c48751c399bbd00713ef7cc59bf31788099e033277d6163c44328' 
  AND token = '7vV1zjjvMZ0+9R8uy3z6pcuiU7oIiuOaFkB5/7udjdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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