Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51106e7bdbfccf9c4dd1c597c9849115f3a2eb9a08cec272ad45f7b854262246' 
  AND token = 'uFNVTa1NXbDn3pMX7uFIlGQk3kcAYiuvmp5AdRf+iec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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