Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51f53bcc84fbb435ca793262e54b588c805ac0da3c58a85b327bae82b83d7331' 
  AND token = 'sYgI/TSRmOGgydXnfQBxtWijR7BCtgpoRJb6hdYkKVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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