SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb22797b1d7e03b4245a826b59305e93db62a6364ff51b9b13de8dbd26771b48' 
  AND token = 'X/WBHq6BmQBzZyn/tSICoB+ecGw3vdOdWOWZe6/2P9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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