Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4af7893169f0a3ac8ff0bd96146deaeda968df0269ac9c7905bd5fea75e2220' 
  AND token = '6poCyEYybetK7C5DwoKET2aRSffeAI4bnO9Vw9W2VG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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