Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bae05a24747c494c845d80189b0d3ce3fa141e431142aaf582ba69631ea5a74' 
  AND token = 'MS3embHlS8a+PmytkQw5UarUymbvCUvJNM1hdtBJvyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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