Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47e6e2edc4b3af677b1bca31a96335ec0bbc94a264394eeb05f7bc93e1a2b0d2' 
  AND token = '9NoTggU2H+4CVwb10WMeDZQMxhjIRBUh7aKa/y6PsWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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