Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cc04d1d07720785cf9529bc1ab68397e0aa9b542631e8a60913c699d16e2041' 
  AND token = 'dwbyWqIEC2zdbp8+Z4BUF35NE01ykYmGhSY5CtALvyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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