Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a4e11dd1d4f89e7120b3c19a29a014ab2f165587109d2eed29853a009435a51' 
  AND token = 'mIjIQ2QgioAEBZFfee4Hoo5NmZLkrXzjtldohRUIjfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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