Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ff624658b8712eb58280afc5a8f3483462db444dbd8df4a9818efe2bd7e65c6' 
  AND token = 'qZ6JPpBSfK7+rpTmjK2lByfZy4etlroncvV7t1gLIyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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