Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53552dab3114424b781c0d3df91681e29ee597c2c51bd9f9035832c4d74e4370' 
  AND token = 'K00ENJu09F0XuHmm8V+f5sXKGUZ4XnQZn7STJuWq0E8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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