Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd65d782e7ca240aaa74602c39a11633704631d08df03062c2f42e633d6cde87' 
  AND token = 'sgvFtBIu8BmA7/i7ffNW6OM5wLMVZ0X8KAN1vVxZPis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}