SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef274a75791e8f661783ee6136ac936d3bdd3a328f0c9688fc8487717f617cac' 
  AND token = 'QAXVYXP1Iiw3P/4qqzJW17p/YXkQ2SBH9huFXznX3K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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