Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '470ba39647c8dfc36d6d995c68e154340032990cbc392234874fe317f4a445f9' 
  AND token = 'uC1BqIK746Kf/2irYjdy4nmLfg3OJ2JOD9mFsTEa1tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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