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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed11524fd7d36262d8f45757f259e4569f51b408424cadbb302bc6df64e6b9cf' 
  AND token = 'vzO7g8noTiWs3u1dwDewfRAFrE6M7AfOng8Dvfq9QrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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