SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb0362b3827878eef3dcef8fb7cb96338a61dcf238e0834f23d1a54c91be564d' 
  AND token = 'Dvp1giUMDbYplRp7XZU7bBTrWz/5VAKwN3gJmxysz1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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