Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f90f6cb3f3e6b7c82642a94a04498f3cf14424932009ffe0a8212224ce513df2' 
  AND token = 'jGSpt1qcUnHd7SCKB67ypb5Jc8BCdcZDzZNtelrLVLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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