Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '376b7c6d8d44e12b6146149685ae872383fe72b3ab4b64cc79d9c8519fccc582' 
  AND token = 'Y6cINBcbY8parhkQNiv15crF4nnzZm5Ixfu2FN+DWcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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