Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c0a88bc116ee3934ac9d841713d253e666489d8275d744672fa5be1ce5696ef' 
  AND token = 'Mjej+VFE5HyftC2giMa8BzCzNCNovvOkR/sPo1cqTfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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