Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63103094c8c0ac4e63e62f9d704e48221d6462de3a7be3faa9febe2ca80beca1' 
  AND token = 'WByzLdX8kqzft+Mgiu/StW9SzWzOv54IsPOHfwVUZpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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