SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ed54074429ca11d9cfbcc2282786388052c8467ac971ad30a9b8cdbf83f9194' 
  AND token = 'HhJlddWW9/xPzohYs29L3yZiGyVvqL+Msh49HWK9s3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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