Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08c8ef30819a49d83805962b3fca47f7974a6f4d3471eb0c89ead191176ba3ca' 
  AND token = '8FBXoVDEIF/uN0NlLhDUd5aA08tJK9kfsmHSxoOHjnY=' 
  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"
    }
  }
}