SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a3480887927f6d2e8e079a267d9bc15acb3c84b7e95b751839bedd8b517ea16' 
  AND token = 'li7JNOg+RKLUXhPGU0VcARprTvwIki7misXY1gf4X8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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