Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5689b585c96381034b001ca36e526de8ae37a25304b5edf0d0d0f9d8a7d8900' 
  AND token = '4QQQFQUXNaWs45ZUM28scZIaEHiF2f3IcuTUyk4rYhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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