Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4c6e514c7c91e17b2f1d39a135fc44b0a558f467e3fd77e07eb8a5c71e82b56' 
  AND token = '8Zr5iRD/PrNpum3M6V20MZRfzhTZ/6ATE00l045FAUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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