Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d80dba58ca99cfcc7849b0a9f005001e7d9cc029505922b89b20c8759aaff13' 
  AND token = 'oHpklpGCOJVu8Bsdyax4Exxj8R0R52of+zxqnsWkago=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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