Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fda0a20161c91cb1d25653327f9527bdb25bccaea1781719a2cbaff583a46b18' 
  AND token = 'QfntGbrp+qO9dk6dDwj6/PjrnOQb5r0lVGF4mUMb/e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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