Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8899abfcd60d3a8433f8a3c918f01289d67a8e465bb79eccab406be25a4a9ab' 
  AND token = 'e5O1BInirFZs9AX6ITC1Fl3JliqeE+sKjiKVXuK+08c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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