Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92aa9a9d965a26b8f849b828a9f2abdedbd0271ae3a66166a895d75e3f85d6d8' 
  AND token = 'KaKbbXnXDbcFFaYijz9pFyCLwS0z7qIgK3x8tZ/o4EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}