SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22fdd7f365f2af50acc09f339fe5e06dd3c13017d24695cac2704826cf63d553' 
  AND token = '2F6sV4Xg9XpvxT7hbfUSqBQhw5tGZzj+zUzC8lbF93k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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