Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86b2db53db28bc481bd5f38b994f899b6001301b2e1d37b81bd7cf84db6cb204' 
  AND token = 'u/OGc48pwcEkd/XXCMqbG+baYw6FWs+ACbeMXg7EKGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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