Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75e9acbfbf3546ed379d9fd5df286a03beeb755fc0f960f5e45a169af3149818' 
  AND token = 'zESuDJKo90yWUOBGQ84mh3rsAhM4Z1LAZ4Izm5CttSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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