Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd0fd5a6f807fa4fb1b080a23b32e40f6a8e050cc36a0e2bd189bee44b7b44d' 
  AND token = '9DtQ41UJNUfSdjBt6Qn0gFvf71U/klfWEvUrp+/10cY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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