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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb129c9fe0c8cba6d6a2f9dfe36caaf45fcfcbbd624b0193c3ff2f20ae06ff2' 
  AND token = 'wk3TaOs9TL5svFuNJkkMG6AUKZpx3JlAqUnIx7caK2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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