Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd53af0ebf58f13689a3868acfd5edb28584610b62104ec3e89fae63d78c7fafa' 
  AND token = '1m8O9o+jyAoczdOfhwgmZekwajHNRrMmLo2DIYQJ4FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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