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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b201fc1dbdff096c32a0a66c039748960321c62f86c6231a63a00340cdc11f0f' 
  AND token = 'AVpWsQrvw8Af1m4F4Dj89KVgWyvAtcoq2Tq/l1mAWVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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