Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bbd3e7049f1b53fca2647578fc1a7d59cc1c937def0b8e11c23b582b997ce03' 
  AND token = '2oc19dDnYBrWevxzpAqKGsz6NXyXJtotxjpiB2lUX88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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