SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe8cd27bde0172dcd843d92be5f30a90417c480dfb1681e43e8c4a1a9982ce17' 
  AND token = 'IgBLbjzH6tYs++/sCqhHlLBa2fP9ZKRVFbs841jyxIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00150

JSON explain

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