Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed5921ebd3cf2060be69e2b01f7c56582c0219d58d1ae31f84d95c828687cbc8' 
  AND token = 'WiQddrVwLgzgOWHc/094jepRaZWB7kdWBrC/ICyCQlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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