SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e565107c1cd6b01315b3f75347ff1dadfd6be59197698c73a82833c9bb72f845' 
  AND token = 'NfHhiUBOhLpjglho9s3YgJC07oG/UC+cjHlwT4TCZOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}