Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb06e782494bc987fc2b915bf79ecd49e7f90d098c779ffaedc51e6c055b8ca9' 
  AND token = 'BE/CT2DRu7apPglCz20YBwozVNPmB3hAI0JyfNMktzA=' 
  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"
    }
  }
}