Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f8cdf94a1f24c060a3ea393d3e26ea8962db07a3ca911e956ff67b7fa945481' 
  AND token = 'W0CIRdcCpQhEt9hAsVw01DUEuNIJTVLOWs+Smh4Xw0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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