Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c3d8be9ca6de0259e0c73a9fe97d37a443d6164ded28ece39207b8034d81c44' 
  AND token = '4Wc9mt6idJTzbKbmZgOOhnqwtCH0MjCaAPz8soY7pJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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