Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c01d89bebe9704d9783e0e782b8c21ce37ffe56d35c31f9e693ad21f544e7e6b' 
  AND token = 'rD4mrI/WzWfzQqe/OOXPidNtskchH5fqhyu8LUoZ7mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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