Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e75fc9f65054c2eecfb5ac69c1eca52a72ab6e28f65425cef9339de20374cd5' 
  AND token = 'nMCkJqdwJ7sgJui1y8eh9u2j28hz8uPSBll338fQUhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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