Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bffebe25214b0ba8b4e6f317e9de5b634b3e0c1139cb24845863dfd9b7449b24' 
  AND token = 'Gbr828y0aUYv2051p4XuQb75vicnFj9+kYSw1rWsgSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}