Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf193a3c93e260e92c3e23459066e9b08eeb3c10b2f7273b2e831713c860635' 
  AND token = 'PmXJ1CAd/EVWCV1sXfD7gq+mkV9is3kLpVugwbn8qRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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