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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d7e457cec5630e991b93289d8447e4ed9a9f1de10dc2f1b3bfaba5a70e0b60' 
  AND token = 'zD5rQr5WUeBL7C87oX9L0Gbogcode19FWX17hUyUkwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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