SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2808d78b29753af2b85a5e40ed4a01ccc46fc6ca5889169b429ad1bef1b8b2f5' 
  AND token = '3w1C/Gbt3GLkn5D4p7K+NZj7/jOYsJxEFGdUE+wnfyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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