Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a166f23f0fc5037468b97656968b5745402f51d727707897235b017b939e4700' 
  AND token = 'zkJ7YbC5EJ7p+Z1u/9P4mFzXcD095E6NOpO58ZEs3fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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