Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af640700f2b4e682fcc5118fdd4f3db252937e785d0d112178777ae1cab77cb8' 
  AND token = 'tz8VOqYw4zREq6YJgoJGIeoVtQhqYts6VYejLeCXc9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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