Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67b67b07d25813a5bd73b7481c9ec7b6c003b09e3fbea22cdcf0620f94431edd' 
  AND token = 'HemTRMuYrUya/1cj/VtZ5bweBTTSA93jM7HgmgNFRfE=' 
  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"
    }
  }
}