Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08335c601638ed84aba02c42a1907d98a507e947f5758c19de220d68baf0bfd4' 
  AND token = 'mW3NDqZcqNnzoHs/hpDo8Ws4WJrUlKcpG34KHfeXiqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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