Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2e680cc2333c810955c703e1afa516aebd9a8df9348b56bed55b613e71003eb' 
  AND token = 'rzl0Gc34ZRdqliYNl5gPLyh96mWm82da7rYoMahf7lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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