Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52e538078de6d407c3d67ca48fd55ea984902456b9f413d836caa41427898ec7' 
  AND token = '8BZavPQZlRfmJXl6GFD83XQszt8Pu7JSSdqmVSGPD08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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