Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4530e55f7d4817ff63d4bf22a6185fc3f86e3cda946f56dfad2234acece13e5' 
  AND token = 'dQJD+ApMW9nS1kbBIL4dm9YP/DZcf0VZBQZSx+gPnJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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