Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8dd5c799b4ce56d274abf41e3bf1ef62ec7db0ccdcc36923d8ec1835e57c153' 
  AND token = 'yk0NHvheJu8gqjySyxzwzc1tYNVfyTC5SgvCqUZaRPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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