SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a226d38510d6ab45ae1bdc59c29a03c10985bd54883d024f8fbaa8179cc3010' 
  AND token = 'B6/fuQIgh7XKdC7K1DHqH8bBGf7rfmPL4Ut7EjlV9Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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