Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1d625f3d9ca0ac7f28c0e4850453d55a96619bfa85517f17bf4d7374ae57c1a' 
  AND token = 'xriDE7wtVUluu1SAsp4HPjCtkbVxMvh8U78MSHYTDno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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