Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25f7fee04bd843940a1987f44ab1b05d568483e24c9b9a785d2071f531eb251a' 
  AND token = 'ty6AJ3FXEiSEh3iUmYm4wt/RPOLr7UbvxnAnBEMpUJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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