Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '818d8e33b6fe88a905e1f65309437f601aaad6bc689ab315cd9a219e8b82ade8' 
  AND token = 'KnrC3s5PSDHZYKh9J5T6gUPVeUzZNwhIuo7PzVkA1PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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