Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db4fd2bf1810e9b5e126899817cb3712fd29a1de2d4a1519de4815533c80fbcc' 
  AND token = '3m8jHGkMkOfu/TO3MmOHDdBpAXe6K2hUhErbAHWWUm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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