Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '417f71bca27dac2126622db86728666a9468e92c5440184c9c7295f194aaccbc' 
  AND token = 'C/xfl8mjyxPutg07QBvg301HaPy++5MTnGqtHYA+dgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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