SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bd6f5f7de5b43ac7f3c833ce29157c42ce489314e5b882f5bb6381ab9266353' 
  AND token = 'h+Poew/CVOYv0vLwHrapXhtJPNBDRgjw04VF2YN9KUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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