Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac23518e7636fd370d3efcd452d9873fdfdf4c303d39795039494a85e9356a16' 
  AND token = 'xURZhrxJQRwwsMILwf89sadx2jPyvxLgvHwglR8pduk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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