Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa33f8736a19cc0691cfa01ea76c66f93b9746522608f4cb8f3b361ce0e50c5' 
  AND token = 'qO61RYk4+jvZXCk8j5gtAvsWPlhUX5PoPq1DBb5OqxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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