Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85c6eac7597790ca7b6ef84b81137c4951699c3ebaa4037a35eaf6e04f7c267d' 
  AND token = 'nIohxQk0d6N5Suuns913XMzX2PyO0WdkK3fY9BOlrNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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