Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7a044031d49028b8816313c4ca303e1fffe82d8fa838cfe9b4836ee32512132' 
  AND token = 'RYiaTSByIqWWwmxI6SH8NfUC6Uf489QctcIn5ciarB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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