Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b848afc9e07111afae861b660efd4f56d89445d6146b12197e401673ab116617' 
  AND token = 'jVE58TkLD4Ne6bQdQnzIxfDSTj0oVOk17o8iGHOTyh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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