Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c0b5705df87c0ce800019f9fe4ee7a9907f7879f49e524d96ee5ae1d6c9cd22' 
  AND token = '5DjhBMXVkatOb26wd8ulZudGQ8mrWD2ajL+emIKIFxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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