Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '289043ff77620302be965d72b38ee2e847ad6492e0819bdea5bb863f633c44d6' 
  AND token = 'PNE131hn5p77oUtNbU37V97X3QrPPol5LFEuXAHKjwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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