Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9caa1279cdb71f397a943e60dc51c8afef160b6fc450daf70bb5565778063d31' 
  AND token = '9rIrkK4JM54HoQJcZUbi35rC6xWmUvCOw+7YT8NUuzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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