SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1794eff6c4a75178ab66669348e3c9ad6de313b30bcd54affb6f7e0c805e14c' 
  AND token = 'RDNBZKo/LF75GJ6j1iVgWO1V/+yA9b44/W2UpgvQl8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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