Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4339541a9f57421086714597f8b406793d438a2a0424279d7c5a6962091d7317' 
  AND token = 'OsAwk6gLbtEJPNqiqNAG1FZmVQrux2eTnih12kSQGqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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