SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0048a736c1c782565b4108db1c1c6efaa5e437fb352962d83ce0937c57601f45' 
  AND token = 'T/uYGUh48GvWEi7VO8hPeszKDalOxdQ3Ztn/nJE59Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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