Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73988af5934f707a2308b6bbc71c45e04041c8807ea920c14f858d95b2f526a4' 
  AND token = 'JVDUKMdKEa8xDCu84qjeLSvHQoRa4NsLzzgcFQ3lbuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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