Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '627c7fd58e7879305f60603528d6b5d6696fc716e8f5c15fedc4e431b0a9a3aa' 
  AND token = 'uM/TKbf214QcoOWBEwFEEREAKE9x2UI1LYlxNiZSOUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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