Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bf61a86dbd3b70b16f39c4848f74d8f29ccd384a6e43474558d9cdcb9330c0e' 
  AND token = 'czrr7I53TWIAvKDacoGMAyXWjeP0vaadFakWz2s8Dhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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