Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3afd391a5f7765dbd969658a154579ee23123831ac7190b38a4d7d5fc66c840c' 
  AND token = 'YB7v6ByFKx8SrlEIZw3/DyZgBv11vP2DwRkddylz4iA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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