Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49a8590f99b6292ef074d00a68475d90cffb8788fe015ee4240713a577255f6a' 
  AND token = 'DW08+jzKKgrkal+OYgb610L+t/rO+fO8mWZZ2iNyf5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}