SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c28ab19d9fee736bf5757b9478f8d9645ee6d22cfc445f87088186dae4b700ab' 
  AND token = 'xlTjVYIHQlu1Q3S3I/wfPmJKR/C7KIXR2eKQDfHq0D8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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