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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae2f7430ef59f78b764bc08c0d96864078a7a45082068fb095d2bf3f98f14ee' 
  AND token = '+9deDdy+r5dbEK0sypJpWqJTVvNE4CILEz/bKZevp/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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