Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d13dcf4dea7a76d3fc3bc7041104078071fb8c155a5f0cb0d06b2c69ceb9d3f' 
  AND token = '1iMMtsJJGNVC7LwFfWMzYAHqoiQWYua4+EIQcc2abbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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