Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3b6888598edae5bc353c38a4f712c528b26a8fcca5f26cadbadb169d5b533c0' 
  AND token = 'ZsZozv7FzxQV3p2/NxVH5qOqiOi8GLdb6Nx4pP6CKFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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