Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6342a7565ffff4bbcc6c08d68bc0665dc289530cb1a17b1192cc304736f687e6' 
  AND token = '4dllUVIZoATCuaAEwYhG3Ykvl1znCDKSyOQfCc5pGQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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