Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b022779497ccdd47e010ad1b2c2e64ea40c803d9438b74e483df7bc15dc76b7' 
  AND token = '2eWbMtXyMg6MsRtUvXi3BJ+D6lMxI5pc/3d/0Pbfip0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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