Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4eddc3551940284ccb0a6a556ab42d530c74be694f489322866ac5d1e8e5efdf' 
  AND token = 'xLzvsxfFtuAUs1uTfUyjUL5SGxxt0W7gHmSlSjV0eX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}