Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8509005833ff6656fc1712620eeb672d749b8e1fab19b2cd2581b8331636609a' 
  AND token = 'kw7/ruo3eXp+WUK0HMBgrlMNSVaQQXuRcwk2Y/JrpIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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