Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbc4b7af83fe3df90ed9a6a6e726a3187923bc451e55006cae55836f94e53979' 
  AND token = 'RNxvFvGAW6aJ3ssyajqrrHYHP+y42UmcRzA2RsOs2Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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