Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2490784a1d377ccda87efff8c20531608b9874a4ff2d6752e8e94d189853daf1' 
  AND token = 'YSdKN3hm5Gufmrb3ohheiBXvukFgZvmcKmpX2eCdL50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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