Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c94dd31beb8986d02e56b4a8014502d2ac3b57a00b4c4ceeabe726866d96e7c9' 
  AND token = '7nZudUjMvoAB3de/ZyxcI4Se4tid9RuP0dEYw1W+13k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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