Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd02dae577edbf92351a43299b1a80123038f13f742af5f8734160b74540c25a8' 
  AND token = 'CEUQIag6kiUQ1s84VSianwK3FHvqG+d7vdRxfSCm1SE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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