Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb72b75a522abfc15a13dc3cc5cd0bfffe4098fed49f6b479f36b8218c88a29d' 
  AND token = '33NNTxLfQAVci+txsvHngRGXsqPqWlR6nmnje5Mn3hA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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