Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac0062fa1fc7088b09658c0d208c229d8840add2bc1cd4b328d1c3822dbb9596' 
  AND token = 'TjirMH6Rktk8IG4FYc6vrC5vKZj0MaIA12IbBwc0ufI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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