Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8573dba8670fc340435b76ba9b6c313cfba897e23bfff4589d6fc3e9325696d6' 
  AND token = '/iokBTGV4IsDTNtl4+xDHdfa9nnfmMzX+BYnioQcEkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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