Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '806dc1f082d0ce236bee0ee65dbf6e60bd7e05818837cc9e49a6a673c051b120' 
  AND token = 'NkMd4OwYtL0rxHEGnVd3npv/+2BRNTTw4iw5w/Myz3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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