Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cbf9e8922e4bfc0c08e88642580ceaa3b02ba325d0d9dc85eafbafbc84431b4' 
  AND token = 'Nxw+1b9eQ7RLjsJ+MD1UzhhkZHyG9g/LhyqfY6Gllc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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