Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0f8c8f2ec747c58c945bf3dfd6c97b13b217b1e148d11ea99c9fe946a9b33f5' 
  AND token = 'GQ2XYy1U/B9YKTnaCfv1ti8ttm09OzINwFs1QDUn1jE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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