Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eef24d4331dadc3e613b221d58d68363fa8ab358e56aad4d89558102be6aff7a' 
  AND token = '24MKJVoTAymsvOXOf6/A2WgTmZauEY29DMB7f1jmCLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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