Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63f49d12b79b136cae1d1c095d0b9e3d9cb08950f366c18dfda6e2836e7b6e7b' 
  AND token = 'cjtHrUTgU1Uf/aciiIrIwR/9PKt6TFdtDuX44cWaueM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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