Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e5143986ac47aa5e132f269f4728339275f98f727467ae13a69592510bc520' 
  AND token = 'fTrm9muZe9MEoIYATQRqHKEvf+OUx1ok0YoRK8NdH2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}