Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd38cacafe0273dc7e9fb18e9ea3b0cc962b9aaa3d518a214cec159ca455b930c' 
  AND token = 'A7MCHJSun19Kt/dTjF/DwMQzm4TzCUqI1CRoWVlg3So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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