Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddc776b368aefc4ca907971b2f40918ffd23fc73831565642ed56f00063a5335' 
  AND token = 'JOZJIjfdaJpFdw9rLvL/LJlsdZL0M796MYA9RKvI91E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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