Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3b211fbfe92a2f602eaa228fc770be55e2a5a1aed8692753ffecd79b56f11b6' 
  AND token = 'iRp8QVcVz6mhyfiZxgSp+xbMhJA3WMS4ikFcKAlp7hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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