Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28040461fb4fbaa95e505b9dc88d38fbb0f010baf077921aee571f0743dc633f' 
  AND token = 'cdF8GL391a3W1rW8Kqt6sST5ywStstCuMuIgOGWWAJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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