Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00ec20b59ee484f6e85b5e351a151397097ab3b593a7b986166fce99b4a065a8' 
  AND token = 'GUJOs0saBImkK2zfWp+OAhjpl5/BTvh54nMHymRuzzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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