Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '121bd0be4e07db73072b94a59ac7eea2d5b4c3807ec8ee14030aa4da17f786c7' 
  AND token = 'TV9J8z5cZuAIqv2CEGkzT0LxzwxGwQaLLk3U4WPV4Wg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}