Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fd29951e77c4cb450b8d17043f2090f6372a02e87daed3f700b159f350d31b4' 
  AND token = 'jH30isMIQqkrQXAetv573YGbQgTgyk48YGqrGwmqwq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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