Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '241894f019d8094edbcc17d807aa4d22024664a6d5ed607822200dcb72b2ef2a' 
  AND token = '1Dh9bmOJ6hZZ8dxzUfSkcF2abA+B9wVeDT5ngtu+Zrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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