Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e797be2263f3ab5ebb812ee63bda8eeeb6dbf24283fdfe8848de1588a974c596' 
  AND token = 'E2VLTPKMfJFk6IFEYqdPbhNk+1qyDWxu6b1Th8k1bAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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