Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df7672320b9081ce07de076f023990e3090055b3cc11cd8bcb4ce66936c02ffa' 
  AND token = '3n/t0kDatRnJV9xW98NtZqo1lDPlBQJ4eG5qymV4yyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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