Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d1844977ecb7d714613999f7efae5ff23a384af20fa439668c2800dd2fe3cc0' 
  AND token = 'hVx4Y4WWyi0hzs3UM7jDc/oJOrrRfeMcyxDLErcxiQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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