Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'aacf7cb3ef07a5ad5237f1d6025eb9c6db8c6e57fa181d923983ea70434f089a' 
  AND token = 'RuTuHOeaoYyWe02wKBwNRIAnQbOGH8MBzSid97j2l/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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