Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '743d654ad1b720a7d0cc842bce289d61aa9bc36372da00bf0e5a1c205e362a45' 
  AND token = 'rsy+Fi2XP/0+akQKKXdGaIaiM3fL0JuiGukQXT7T6Lk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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