Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c26be3c0929595a70d9a7ee1f532bca0ca9783c6d4676f45e8dbc98cf6dd0fb' 
  AND token = 'gWqvedLOQAqLxjP2ZIy88vfwpN9LmCA9/KOM5mJg6N8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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