Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c67bd5bfc3759bc96ec18cabb11c4e742e992c830624be93e620b0e55b0ba4fa' 
  AND token = 'd7p6fw+W+LLPHlYhGLB1PIPxBrW0OSvR/w+aQ87WM24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}