Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99726bcf50483f0c1251938582463fcd4fb038bddec60830421723af644362d9' 
  AND token = 'xs5TM8WyoTZstnIzELkeW5xkNU0CdG7S4eQ8MrsIllU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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