Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e20af56712d4f1e90682ef79ecf7205ad5e098da1b855bc94980712d554d1a7' 
  AND token = 'OvoGirFGwB4fx1Phq3B/5jyMQTb//tkBlq8gwp9k8hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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