Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '744dd3de94a89864934af57a926415af21ba0231132a20d9a4a7e101f29db3dc' 
  AND token = 'I0xb7XTT1Y8sa4afpqnApQHg2TIsXlbXC6+8/keTKlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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