Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6432c5fbc60b8e4960699089c4543a827046f4af7b9f9af33f642c07a60adc5e' 
  AND token = 'XfcpOBpqIxUdMKg5khIiH6w/TZ+iSHs2s0+cKs+DxvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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