Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57eb2d9c811dd2b74449fb176aef4e446f14b6db0d851a0a27809e39b74206b8' 
  AND token = 's1jBv4SMnnjjaDRvQjuILL/bNjSOhWDw8QF3O0gAlC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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