Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0b2c689d2d75fa9f4d68e7d34a6e97afd9ec8f57eeda27d09f949f1e234fa67' 
  AND token = 'rwswC0so3FiQsU6gp4xgzOGBf6EIZNiBMuyJ5SBONDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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