Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe94c348ce28216d32a57597505036482e4c7e10b5031a1629b15e9e1ad0d4cd' 
  AND token = 'mRI4USRi5yXQsPLRING8rcege5qtBD2JHvAwDBkgpIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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