Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eadfc41b66c88a8e8d25fb70cb861152c57b115d11422283c6b785a269f4e88' 
  AND token = '9w5045gZFMu4cn9YAXqo+Dox2BfMKJc88LzrYesQ3gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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