Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bd17813fdcfa1ea869f48e7e8f97c9d2d6bb9e5e170c4e359b6198ace0b3b91' 
  AND token = 'VgRuJlINbgIqWZoI7+SFOta3ISF3GZ6paf9jz5x1RXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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