Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd124b7d8cd04ec2e4fab110abd0111b8902f12769165b91caa572512fb610b4f' 
  AND token = 'F7qipu+7j3Gal1KMiGmRf6z7XX1tvKaWDxILFqeZMGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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