Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f54ae435487332a3faafa59287266e908f7be80cda6e9518644da22f3541cded' 
  AND token = 'KnYZC1uSRf6QkXQf+ExsZIlGUFxIex10RYIDto556BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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