Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '16ae840eb79e2d28bb28983634d0948d5481911334ea771950ad047da9d2b005' 
  AND token = 'nJiMMA+Msn3ZFAjj8mD1mtBTXSR4rVDVzN9ErvHsp+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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