Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7d3177cf8b080eedb07dc76a7381cfad3286109d90bbad99da8d5f546744fa6' 
  AND token = 'j3rJ/0u/dR93gW54sI8WpEbtxzfAja4BGQWgEqXutGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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