SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '182bc5e013324e722583e2f5ed9645fe6a61eb9462caa355cfb191cf4f85f97b' 
  AND token = 'obTtpK4/DZ+Xoqw+GbJ2u5p/bHyznA883KhJm1RaiJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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