Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85841fbcd6d1aee30fe6b477f92826badf538c3ec98cecddf0ce646294370d5b' 
  AND token = 'o/4OZ6J3y5wsWD9J4SFrv7jUfq8tEgX7/avQ3ei4zUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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