Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c7569b7ef853e667e5860efeb587b0e4fb771673a9a3884e534281b7c7e74af' 
  AND token = 'GhQRAsE0vYa8ap//+t76fhtpommASOr5e/ooyZxkTQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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