Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5a683b174cec8daf05e038b40e1f46ae5de6fecdde7ca90ff8a2f399e531004' 
  AND token = '8WPnL+b/Ap8rmsnl8KzoNyZ8Z73fm8RiSW2A2pFhOks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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