Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '93ff974d1b545052f96f138308540d1068c703f58624d32cf6e4a6e2272e5448' 
  AND token = 'u8fjprYfvdsXYRKlgedmsdFKteuYmVl4iDEbZN0LsT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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