Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06841931e5506b0029c5ef37d7a22d2618d2b3f06512e9f4eff4022966807ce8' 
  AND token = 'RcxxV0YHrYut1LpGOgqddlyqHInu579qWE34jCcbiQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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