Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ef6d9dbc227e4251070c3f5665167655600c3f612013657ec9d0dcb53cb4741' 
  AND token = 'GAx5GnM938gYpYhuPCatW/PuYSSwmWFg+ugC+G6NYJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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