Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9f1d9788e9f6e1261b9daf3005ea7333ce47dfaa7ed0abc2272bc35285641c4' 
  AND token = 'uwkebQBzE5j8d4QVUjLO6iErtk+KAzmAHitiwEVw2c4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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