Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c09b13d50eeeab79b57d6fca8d7bf4b6e03f05c6b95fa5f48b723586f3eddc5' 
  AND token = 'rQuMrjzF6NcexuwWvxi/FauXweSGyt6I8p4OZjhSMys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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