Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de315fb36e33f1521cae52b95fab983d64328738e64dba54022eb7865cbaa22c' 
  AND token = 'IYbzSJ9P7pOdi49VSzZ7wIkX9osrY1ioc5kqfuXtKQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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