Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d284505487c3123b6eaba2b66728c0a3092dc5f912bc8a3504e0253f6778e7b' 
  AND token = 'Yh/9IkM2chkxU5dUAV4Mck9Mo/8t/VW6ZW2jPtz8X4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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