Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3baa90ef4435e7730935367beb0891db73757051d621e60bcfeb1384d9ca900a' 
  AND token = 'TSdyDqufJBSNsiMBhfk2r7jx6LB82yWUinqKgW1Tyow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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