Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd16a4ae1394b8c24ffcf621bce09aafcf12ab2164312ce2ae15fc2dd099be32e' 
  AND token = 'ZBBVOR771BfRPU+YmIjA0rwBVc/W2vZmCbdMxiCji+Y=' 
  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"
    }
  }
}