Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82d8d7c7065af71b16e514ac998309d53899a68cc3235cc8ab514868fa37c123' 
  AND token = '4cv9V7YbPvktL4EVmddqvfivpIfDdt7e6ja2ZtSURdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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