Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '467a58d74a2787c3631faa5d450c47dd5ad8e3d6a4a0fe4e4aa569856b8b7df1' 
  AND token = 'Eoy902kcK99tEc8dEhGhB04YtcxJQtsU1+qavQYO1uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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