Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3ef6f9ba9d684c60c4e7c3a1b0094e0e0940f1d170074bef095a23e180fab1d' 
  AND token = 'E+2qxisj50GDKOP8czueJVIzYaIi2wh+2R4fg5a6rSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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