Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2d3a5b3e5f6a55caa8e0b7a26a014f6bbae6466e5cf30957d5be8708eeba04f' 
  AND token = 'LqITZBg0+v5tMvjja7EzAjgfCbQ8TwIbzfvN6NB/O1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00139

JSON explain

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