Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ae0a1e8b7bda06c22a9ad52c8ca8920fd1c25c466d09eb884725c6e9bd7ea1d' 
  AND token = 'uMQ+sclJPeWbwIy69UvV9ATdHWohLJtNC05ee+t+MsM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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