Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ba483e33c4ec099cca50f710c95b33d3c80f7c35d0cae4f4f804e68f0a0d96' 
  AND token = 'zxUnlgsUJ5v+prMQyVHpa94ty7LbEDqAlz9DyBoVx6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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