SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95e485d4fb96a36c8cf5841449ee3fa601592117cf7f614594bdc0c2412afa94' 
  AND token = 'jYLQvWKq1nGGkX62WFTZ7iIfagN7lEYLEo67aSJ/WB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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