Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d3fe2c60ccc4f09fda4660aadce4ded618c23ea549d34968a3286857e2cd76' 
  AND token = 'wAzVNClsdd3LzmEWH6CkoQ5AWjo9mqC8Xe/+LHTrdCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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