Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f845d0a583f873a729fdeebf8d134af3e493beb5d5bf4f95c093383189f1650c' 
  AND token = 'WMItTh0Z2jYEkXu61rWvcRugpRJTxYf662iFobJ7nQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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