Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3b232ca84a63a346a248aef5d68a6f97cef896a8b3b4d57eff151f752a3a6f6' 
  AND token = 'SaH7wtwrKQZ2DpKrls+BV5ByeMLtD/wCF2/bFRzVMw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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