Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aad48c8dadbfc2dabacccfdb1af0faf973b74da8265be2758e703bb473b7b192' 
  AND token = 'hTfqFAp5QJ2fQzIpoA+L8BPmtHkaRUMbI0Y7CrScRnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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