Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90d81350b9fb6d3c6a713d937164ace2f1f93f6c2bb15efb3a2300bb1de1a707' 
  AND token = 'y1CXZsD8ixENj0RGxBVRIks/yDyVytjVxHtje1+aebo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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