Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27b9e7ae6f6dcd6d25d2dc119575f31b299a6b52c650cb02776b290a4244d627' 
  AND token = 'qaBYrm1bLmuuCff+uD9weP4Wl6TYlOB01TepTjmCSAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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