Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85cac62e9b258f15f4832042f7d084daac5852c5435e37e68b9638f4bccdaaa6' 
  AND token = '40Mon3OCZVdb6JjWgEV8gF4Fg45KlvQ377uObaSnbaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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