Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acb2fa4d4e2e550428dffb9288c54fc0a1406e4e88d526766a46fb17b8007fad' 
  AND token = 'P0Bdjqt+skcEpyoX4KeODkvxuseNIxxWN1xcZZsv9xQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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