Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0074932f697e79e0ff55a3284e580a047db52d9ca831a25c3a21bd423c82be5' 
  AND token = 'kd9GUwqWiuoV5Q7rFlTrQSxjtKPcnuqWxh0hLEbTvq0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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