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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69bdcc9827734ba216c9f1035f8aae16aa0b9fe392b8d2588749ac22019a3102' 
  AND token = 'QbMjmm3G2NKCu5F1TxQp9DCnnfy79QV2/GzrH9ypATA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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