Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10981ce7b5acfa58fb4c3d739ad85d2aa3da7e834309a904f69af725094158ee' 
  AND token = 'XuKcmNbqqzAarvyt8XcBLsjAdFMPDopiCEU7CyxsxAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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