Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd21b042c6bd299a5fd04b02b55d52c02391d4ee728496c952122ea1441e97851' 
  AND token = 'qMT85HNSdw/4wkyoWfndhfIB9NQAQ77Z46HfuEeYyFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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